215581662882 has 12 divisors (see below), whose sum is σ = 467093602950. Its totient is φ = 71860554288.

The previous prime is 215581662869. The next prime is 215581662883. The reversal of 215581662882 is 288266185512.

215581662882 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 8 + 1 + 6 + 628 + 8 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 167010351561 + 48571311321 = 408669^2 + 220389^2 .

It is not an unprimeable number, because it can be changed into a prime (215581662883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5988379507 + ... + 5988379542.

Almost surely, 2^215581662882 is an apocalyptic number.

215581662882 is an abundant number, since it is smaller than the sum of its proper divisors (251511940068).

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

215581662882 is a wasteful number, since it uses less digits than its factorization.

215581662882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11976759057 (or 11976759054 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 54.

The spelling of 215581662882 in words is "two hundred fifteen billion, five hundred eighty-one million, six hundred sixty-two thousand, eight hundred eighty-two".