215980 has 12 divisors (see below), whose sum is σ = 453600. Its totient is φ = 86384.

The previous prime is 215959. The next prime is 215981. The reversal of 215980 is 89512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215981) 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, 5380 + ... + 5419.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2²¹⁵⁹⁸⁰ is an apocalyptic number.

215980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215980 is an abundant number, since it is smaller than the sum of its proper divisors (237620).

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

215980 is a wasteful number, since it uses less digits than its factorization.

215980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10808 (or 10806 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 215980 is about 464.7364844727. The cubic root of 215980 is about 59.9981480910.

The spelling of 215980 in words is "two hundred fifteen thousand, nine hundred eighty".