231664608 has 72 divisors (see below), whose sum is σ = 752916528. Its totient is φ = 66189312.

The previous prime is 231664603. The next prime is 231664619. The reversal of 231664608 is 806466132.

231664608 is a `hidden beast` number, since 2 + 3 + 1 + 6 + 646 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231664603) 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 11 ways as a sum of consecutive naturals, for example, 55441 + ... + 59472.

It is an arithmetic number, because the mean of its divisors is an integer number (10457174).

Almost surely, 2^231664608 is an apocalyptic number.

231664608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

231664608 is an abundant number, since it is smaller than the sum of its proper divisors (521251920).

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

231664608 is a wasteful number, since it uses less digits than its factorization.

231664608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114936 (or 114925 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 231664608 is about 15220.5324479796. The cubic root of 231664608 is about 614.1671216219.

The spelling of 231664608 in words is "two hundred thirty-one million, six hundred sixty-four thousand, six hundred eight".