231767664 has 80 divisors (see below), whose sum is σ = 636387840. Its totient is φ = 72432640.

The previous prime is 231767617. The next prime is 231767677. The reversal of 231767664 is 466767132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351367 + ... + 352025.

It is an arithmetic number, because the mean of its divisors is an integer number (7954848).

Almost surely, 2^231767664 is an apocalyptic number.

231767664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231767664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318193920).

231767664 is an abundant number, since it is smaller than the sum of its proper divisors (404620176).

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

231767664 is a wasteful number, since it uses less digits than its factorization.

231767664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118 (or 1112 counting only the distinct ones).

The product of its digits is 254016, while the sum is 42.

The square root of 231767664 is about 15223.9174984627. The cubic root of 231767664 is about 614.2581788682.

The spelling of 231767664 in words is "two hundred thirty-one million, seven hundred sixty-seven thousand, six hundred sixty-four".