231609056 has 48 divisors (see below), whose sum is σ = 522547200. Its totient is φ = 98989440.

The previous prime is 231609047. The next prime is 231609073. The reversal of 231609056 is 650906132.

It is a happy number.

It is a super-2 number, since 2×231609056² = 107285509642422272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 95345 + ... + 97743.

It is an arithmetic number, because the mean of its divisors is an integer number (10886400).

Almost surely, 2^231609056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231609056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261273600).

231609056 is an abundant number, since it is smaller than the sum of its proper divisors (290938144).

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

231609056 is a wasteful number, since it uses less digits than its factorization.

231609056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847 (or 2839 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 231609056 is about 15218.7074352588. The cubic root of 231609056 is about 614.1180263088.

The spelling of 231609056 in words is "two hundred thirty-one million, six hundred nine thousand, fifty-six".