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231310442 = 21117336067
BaseRepresentation
bin11011100100110…
…00010001101010
3121010020210021102
431302120101222
5433203413232
634541441402
75506051316
oct1562302152
9533223242
10231310442
11109628a60
1265570262
1338bca8ac
1422a12b46
1515491662
hexdc9846a

231310442 has 16 divisors (see below), whose sum is σ = 378788832. Its totient is φ = 105063120.

The previous prime is 231310441. The next prime is 231310447. The reversal of 231310442 is 244013132.

It is not an unprimeable number, because it can be changed into a prime (231310441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 35093 + ... + 41159.

It is an arithmetic number, because the mean of its divisors is an integer number (23674302).

Almost surely, 2231310442 is an apocalyptic number.

231310442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231310442 is a deficient number, since it is larger than the sum of its proper divisors (147478390).

231310442 is a wasteful number, since it uses less digits than its factorization.

231310442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7813.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 231310442 is about 15208.8935166238. The cubic root of 231310442 is about 613.8539849503.

Adding to 231310442 its reverse (244013132), we get a palindrome (475323574).

The spelling of 231310442 in words is "two hundred thirty-one million, three hundred ten thousand, four hundred forty-two".

Divisors: 1 2 11 22 1733 3466 6067 12134 19063 38126 66737 133474 10514111 21028222 115655221 231310442