215992196 has 18 divisors (see below), whose sum is σ = 439698798. Its totient is φ = 92568000.

The previous prime is 215992177. The next prime is 215992211. The reversal of 215992196 is 691299512.

It can be written as a sum of positive squares in only one way, i.e., 215678596 + 313600 = 14686^2 + 560^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 550805 + ... + 551196.

It is an arithmetic number, because the mean of its divisors is an integer number (24427711).

Almost surely, 2^215992196 is an apocalyptic number.

It is an amenable number.

215992196 is an abundant number, since it is smaller than the sum of its proper divisors (223706602).

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

215992196 is a wasteful number, since it uses less digits than its factorization.

215992196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102019 (or 1102010 counting only the distinct ones).

The product of its digits is 87480, while the sum is 44.

The square root of 215992196 is about 14696.6729568294. The cubic root of 215992196 is about 599.9927739870.

The spelling of 215992196 in words is "two hundred fifteen million, nine hundred ninety-two thousand, one hundred ninety-six".