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631326042 = 233173718587
BaseRepresentation
bin100101101000010…
…100010101011010
31121222221200112000
4211220110111122
52243104413132
6142351301430
721434116464
oct4550242532
91558850460
10631326042
112a4404666
1215751a876
13a0a46309
145dbbd134
153a65987c
hex25a1455a

631326042 has 64 divisors (see below), whose sum is σ = 1525703040. Its totient is φ = 192699648.

The previous prime is 631326029. The next prime is 631326071. The reversal of 631326042 is 240623136.

631326042 is a `hidden beast` number, since 631 + 3 + 26 + 0 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 631325997 and 631326015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24673 + ... + 43259.

It is an arithmetic number, because the mean of its divisors is an integer number (23839110).

Almost surely, 2631326042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631326042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (762851520).

631326042 is an abundant number, since it is smaller than the sum of its proper divisors (894376998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631326042 is a wasteful number, since it uses less digits than its factorization.

631326042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18652 (or 18646 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 631326042 is about 25126.2022995916. The cubic root of 631326042 is about 857.8629298370.

Adding to 631326042 its reverse (240623136), we get a palindrome (871949178).

The spelling of 631326042 in words is "six hundred thirty-one million, three hundred twenty-six thousand, forty-two".

Divisors: 1 2 3 6 9 17 18 27 34 37 51 54 74 102 111 153 222 306 333 459 629 666 918 999 1258 1887 1998 3774 5661 11322 16983 18587 33966 37174 55761 111522 167283 315979 334566 501849 631958 687719 947937 1003698 1375438 1895874 2063157 2843811 4126314 5687622 6189471 8531433 11691223 12378942 17062866 18568413 23382446 35073669 37136826 70147338 105221007 210442014 315663021 631326042