231664056 has 32 divisors (see below), whose sum is σ = 623711760. Its totient is φ = 71281152.

The previous prime is 231664051. The next prime is 231664057. The reversal of 231664056 is 650466132.

It is a super-2 number, since 2×231664056² = 107336469684742272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231664051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370945 + ... + 371568.

Almost surely, 2^231664056 is an apocalyptic number.

231664056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

231664056 is an abundant number, since it is smaller than the sum of its proper divisors (392047704).

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

231664056 is a wasteful number, since it uses less digits than its factorization.

231664056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742535 (or 742531 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 231664056 is about 15220.5143145690. The cubic root of 231664056 is about 614.1666338183.

The spelling of 231664056 in words is "two hundred thirty-one million, six hundred sixty-four thousand, fifty-six".