231565104 has 120 divisors (see below), whose sum is σ = 682456320. Its totient is φ = 73155456.

The previous prime is 231565097. The next prime is 231565121. The reversal of 231565104 is 401565132.

231565104 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 651 + 0 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 460117 + ... + 460619.

It is an arithmetic number, because the mean of its divisors is an integer number (5687136).

Almost surely, 2^231565104 is an apocalyptic number.

231565104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231565104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341228160).

231565104 is an abundant number, since it is smaller than the sum of its proper divisors (450891216).

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

231565104 is a wasteful number, since it uses less digits than its factorization.

231565104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 231565104 is about 15217.2633544931. The cubic root of 231565104 is about 614.0791771902.

The spelling of 231565104 in words is "two hundred thirty-one million, five hundred sixty-five thousand, one hundred four".