231695660 has 48 divisors (see below), whose sum is σ = 561302784. Its totient is φ = 78691008.

The previous prime is 231695657. The next prime is 231695689. The reversal of 231695660 is 66596132.

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, 7247 + ... + 22713.

It is an arithmetic number, because the mean of its divisors is an integer number (11693808).

Almost surely, 2^231695660 is an apocalyptic number.

231695660 is a gapful number since it is divisible by the number (20) 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 231695660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280651392).

231695660 is an abundant number, since it is smaller than the sum of its proper divisors (329607124).

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

231695660 is a wasteful number, since it uses less digits than its factorization.

231695660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15590 (or 15588 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 231695660 is about 15221.5524832390. The cubic root of 231695660 is about 614.1945610966.

The spelling of 231695660 in words is "two hundred thirty-one million, six hundred ninety-five thousand, six hundred sixty".