231647660 has 12 divisors (see below), whose sum is σ = 486460128. Its totient is φ = 92659056.

The previous prime is 231647657. The next prime is 231647681. The reversal of 231647660 is 66746132.

It is a self number, because there is not a number n which added to its sum of digits gives 231647660.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5791172 + ... + 5791211.

It is an arithmetic number, because the mean of its divisors is an integer number (40538344).

Almost surely, 2^231647660 is an apocalyptic number.

231647660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231647660 is an abundant number, since it is smaller than the sum of its proper divisors (254812468).

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

231647660 is a wasteful number, since it uses less digits than its factorization.

231647660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11582392 (or 11582390 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 231647660 is about 15219.9756898623. The cubic root of 231647660 is about 614.1521442828.

The spelling of 231647660 in words is "two hundred thirty-one million, six hundred forty-seven thousand, six hundred sixty".