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10231805 = 510120261
BaseRepresentation
bin100111000001…
…111111111101
3201020211101202
4213001333331
510104404210
61003145245
7152653223
oct47017775
921224352
1010231805
115859341
123515225
13217322c
141504b13
15d719a5
hex9c1ffd

10231805 has 8 divisors (see below), whose sum is σ = 12400344. Its totient is φ = 8104000.

The previous prime is 10231801. The next prime is 10231813. The reversal of 10231805 is 50813201.

10231805 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 763876 + 9467929 = 874^2 + 3077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10231805 - 22 = 10231801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10231801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9626 + ... + 10635.

It is an arithmetic number, because the mean of its divisors is an integer number (1550043).

Almost surely, 210231805 is an apocalyptic number.

It is an amenable number.

10231805 is a deficient number, since it is larger than the sum of its proper divisors (2168539).

10231805 is a wasteful number, since it uses less digits than its factorization.

10231805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20367.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 10231805 is about 3198.7192749599. The cubic root of 10231805 is about 217.0954650852.

The spelling of 10231805 in words is "ten million, two hundred thirty-one thousand, eight hundred five".

Divisors: 1 5 101 505 20261 101305 2046361 10231805