231164560 has 160 divisors (see below), whose sum is σ = 618710400. Its totient is φ = 79564800.

The previous prime is 231164509. The next prime is 231164579. The reversal of 231164560 is 65461132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1551366 + ... + 1551514.

It is an arithmetic number, because the mean of its divisors is an integer number (3866940).

Almost surely, 2^231164560 is an apocalyptic number.

231164560 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 231164560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309355200).

231164560 is an abundant number, since it is smaller than the sum of its proper divisors (387545840).

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

231164560 is a wasteful number, since it uses less digits than its factorization.

231164560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 231164560 is about 15204.0968163189. The cubic root of 231164560 is about 613.7249101038.

The spelling of 231164560 in words is "two hundred thirty-one million, one hundred sixty-four thousand, five hundred sixty".