231571256 has 48 divisors (see below), whose sum is σ = 515872800. Its totient is φ = 97125504.

The previous prime is 231571231. The next prime is 231571261. The reversal of 231571256 is 652175132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12140 + ... + 24708.

It is an arithmetic number, because the mean of its divisors is an integer number (10747350).

Almost surely, 2^231571256 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 231571256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257936400).

231571256 is an abundant number, since it is smaller than the sum of its proper divisors (284301544).

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

231571256 is a wasteful number, since it uses less digits than its factorization.

231571256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12636 (or 12625 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The square root of 231571256 is about 15217.4654919931. The cubic root of 231571256 is about 614.0846152312.

The spelling of 231571256 in words is "two hundred thirty-one million, five hundred seventy-one thousand, two hundred fifty-six".