231455660 has 48 divisors (see below), whose sum is σ = 500199840. Its totient is φ = 89909760.

The previous prime is 231455657. The next prime is 231455671. The reversal of 231455660 is 66554132.

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, 226631 + ... + 227649.

It is an arithmetic number, because the mean of its divisors is an integer number (10420830).

Almost surely, 2^231455660 is an apocalyptic number.

231455660 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 231455660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250099920).

231455660 is an abundant number, since it is smaller than the sum of its proper divisors (268744180).

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

231455660 is a wasteful number, since it uses less digits than its factorization.

231455660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 231455660 is about 15213.6668821162. Note that the first 3 decimals coincide. The cubic root of 231455660 is about 613.9824184082.

The spelling of 231455660 in words is "two hundred thirty-one million, four hundred fifty-five thousand, six hundred sixty".