231957856 has 24 divisors (see below), whose sum is σ = 491796144. Its totient is φ = 107057280.

The previous prime is 231957827. The next prime is 231957857. The reversal of 231957856 is 658759132.

231957856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231957857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278380 + ... + 279211.

It is an arithmetic number, because the mean of its divisors is an integer number (20491506).

Almost surely, 2^231957856 is an apocalyptic number.

231957856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

231957856 is an abundant number, since it is smaller than the sum of its proper divisors (259838288).

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

231957856 is a wasteful number, since it uses less digits than its factorization.

231957856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557614 (or 557606 counting only the distinct ones).

The product of its digits is 453600, while the sum is 46.

The square root of 231957856 is about 15230.1627043180. The cubic root of 231957856 is about 614.4261560678.

The spelling of 231957856 in words is "two hundred thirty-one million, nine hundred fifty-seven thousand, eight hundred fifty-six".