231636664 has 16 divisors (see below), whose sum is σ = 496364400. Its totient is φ = 99272832.

The previous prime is 231636661. The next prime is 231636673. The reversal of 231636664 is 466636132.

231636664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231636661) 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, 2068129 + ... + 2068240.

It is an arithmetic number, because the mean of its divisors is an integer number (31022775).

Almost surely, 2^231636664 is an apocalyptic number.

It is an amenable number.

231636664 is an abundant number, since it is smaller than the sum of its proper divisors (264727736).

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

231636664 is a wasteful number, since it uses less digits than its factorization.

231636664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136382 (or 4136378 counting only the distinct ones).

The product of its digits is 93312, while the sum is 37.

The square root of 231636664 is about 15219.6144497816. The cubic root of 231636664 is about 614.1424264728.

The spelling of 231636664 in words is "two hundred thirty-one million, six hundred thirty-six thousand, six hundred sixty-four".