215123980 has 24 divisors (see below), whose sum is σ = 452127312. Its totient is φ = 85979712.

The previous prime is 215123959. The next prime is 215124011. The reversal of 215123980 is 89321512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26034 + ... + 33286.

It is an arithmetic number, because the mean of its divisors is an integer number (18838638).

Almost surely, 2^215123980 is an apocalyptic number.

215123980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215123980 is an abundant number, since it is smaller than the sum of its proper divisors (237003332).

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

215123980 is a wasteful number, since it uses less digits than its factorization.

215123980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8745 (or 8743 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 215123980 is about 14667.1053722267. The cubic root of 215123980 is about 599.1877713409.

The spelling of 215123980 in words is "two hundred fifteen million, one hundred twenty-three thousand, nine hundred eighty".