231656664 has 32 divisors (see below), whose sum is σ = 609624000. Its totient is φ = 73154592.

The previous prime is 231656653. The next prime is 231656687. The reversal of 231656664 is 466656132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253554 + ... + 254465.

It is an arithmetic number, because the mean of its divisors is an integer number (19050750).

Almost surely, 2^231656664 is an apocalyptic number.

231656664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231656664 is an abundant number, since it is smaller than the sum of its proper divisors (377967336).

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

231656664 is a wasteful number, since it uses less digits than its factorization.

231656664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508047 (or 508043 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The square root of 231656664 is about 15220.2714824671. The cubic root of 231656664 is about 614.1601014165.

The spelling of 231656664 in words is "two hundred thirty-one million, six hundred fifty-six thousand, six hundred sixty-four".