215556132 has 48 divisors (see below), whose sum is σ = 550029312. Its totient is φ = 65160480.

The previous prime is 215556109. The next prime is 215556149. The reversal of 215556132 is 231655512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 215556132.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59353 + ... + 62879.

It is an arithmetic number, because the mean of its divisors is an integer number (11458944).

Almost surely, 2^215556132 is an apocalyptic number.

215556132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

215556132 is an abundant number, since it is smaller than the sum of its proper divisors (334473180).

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

215556132 is a wasteful number, since it uses less digits than its factorization.

215556132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4008 (or 4006 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 215556132 is about 14681.8299949291. The cubic root of 215556132 is about 599.5887292695.

The spelling of 215556132 in words is "two hundred fifteen million, five hundred fifty-six thousand, one hundred thirty-two".