215116868 has 6 divisors (see below), whose sum is σ = 376454526. Its totient is φ = 107558432.

The previous prime is 215116859. The next prime is 215116883. The reversal of 215116868 is 868611512.

It can be written as a sum of positive squares in only one way, i.e., 171662404 + 43454464 = 13102^2 + 6592^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26889605 + ... + 26889612.

It is an arithmetic number, because the mean of its divisors is an integer number (62742421).

Almost surely, 2^215116868 is an apocalyptic number.

It is an amenable number.

215116868 is a deficient number, since it is larger than the sum of its proper divisors (161337658).

215116868 is a wasteful number, since it uses less digits than its factorization.

215116868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53779221 (or 53779219 counting only the distinct ones).

The product of its digits is 23040, while the sum is 38.

The square root of 215116868 is about 14666.8629229294. The cubic root of 215116868 is about 599.1811682177.

The spelling of 215116868 in words is "two hundred fifteen million, one hundred sixteen thousand, eight hundred sixty-eight".