215901015996 has 24 divisors (see below), whose sum is σ = 504274350160. Its totient is φ = 71894817792.

The previous prime is 215901015989. The next prime is 215901016027. The reversal of 215901015996 is 699510109512.

It is a super-2 number, since 2×215901015996² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 9010981 + ... + 9034908.

Almost surely, 2^215901015996 is an apocalyptic number.

It is an amenable number.

215901015996 is an abundant number, since it is smaller than the sum of its proper divisors (288373334164).

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

215901015996 is a wasteful number, since it uses less digits than its factorization.

215901015996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18046893 (or 18046891 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 48.

The spelling of 215901015996 in words is "two hundred fifteen billion, nine hundred one million, fifteen thousand, nine hundred ninety-six".