231617960 has 64 divisors (see below), whose sum is σ = 596920320. Its totient is φ = 79234560.

The previous prime is 231617959. The next prime is 231617963. The reversal of 231617960 is 69716132.

It is a Cunningham number, because it is equal to 15219²-1.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 231617960.

It is not an unprimeable number, because it can be changed into a prime (231617963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212537 + ... + 213623.

It is an arithmetic number, because the mean of its divisors is an integer number (9326880).

Almost surely, 2^231617960 is an apocalyptic number.

231617960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231617960 is an abundant number, since it is smaller than the sum of its proper divisors (365302360).

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

231617960 is a wasteful number, since it uses less digits than its factorization.

231617960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866 (or 1862 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 231617960 is about 15218.9999671463. Note that the first 4 decimals coincide. The cubic root of 231617960 is about 614.1258959447.

The spelling of 231617960 in words is "two hundred thirty-one million, six hundred seventeen thousand, nine hundred sixty".