231256256 has 112 divisors (see below), whose sum is σ = 577608192. Its totient is φ = 89241600.

The previous prime is 231256247. The next prime is 231256261. The reversal of 231256256 is 652652132.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-3 number, since 3×231256256³ (a number of 26 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822836 + ... + 823116.

It is an arithmetic number, because the mean of its divisors is an integer number (5157216).

Almost surely, 2^231256256 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 231256256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288804096).

231256256 is an abundant number, since it is smaller than the sum of its proper divisors (346351936).

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

231256256 is a wasteful number, since it uses less digits than its factorization.

231256256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 468 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 231256256 is about 15207.1120203673. The cubic root of 231256256 is about 613.8060480891.

The spelling of 231256256 in words is "two hundred thirty-one million, two hundred fifty-six thousand, two hundred fifty-six".