215980560 has 80 divisors (see below), whose sum is σ = 743940480. Its totient is φ = 57594240.

The previous prime is 215980559. The next prime is 215980561. The reversal of 215980560 is 65089512.

It is a happy number.

215980560 is a `hidden beast` number, since 2 + 1 + 5 + 98 + 0 + 560 = 666.

215980560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (215980559) and next prime (215980561).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (215980561) 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, 47836 + ... + 52155.

It is an arithmetic number, because the mean of its divisors is an integer number (9299256).

Almost surely, 2^215980560 is an apocalyptic number.

215980560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215980560 is an abundant number, since it is smaller than the sum of its proper divisors (527959920).

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

215980560 is a wasteful number, since it uses less digits than its factorization.

215980560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100013 (or 100001 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 215980560 is about 14696.2770795872. The cubic root of 215980560 is about 599.9819994600.

The spelling of 215980560 in words is "two hundred fifteen million, nine hundred eighty thousand, five hundred sixty".