215795560 has 16 divisors (see below), whose sum is σ = 485540100. Its totient is φ = 86318208.

The previous prime is 215795549. The next prime is 215795561. The reversal of 215795560 is 65597512.

It can be written as a sum of positive squares in 2 ways, for example, as 215678596 + 116964 = 14686^2 + 342^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 5394889 = 215795560 / (2 + 1 + 5 + 7 + 9 + 5 + 5 + 6 + 0).

It is not an unprimeable number, because it can be changed into a prime (215795561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2697405 + ... + 2697484.

Almost surely, 2^215795560 is an apocalyptic number.

215795560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215795560 is an abundant number, since it is smaller than the sum of its proper divisors (269744540).

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

215795560 is a wasteful number, since it uses less digits than its factorization.

215795560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5394900 (or 5394896 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 40.

The square root of 215795560 is about 14689.9816201383. The cubic root of 215795560 is about 599.8106439505.

The spelling of 215795560 in words is "two hundred fifteen million, seven hundred ninety-five thousand, five hundred sixty".