215557015156 has 12 divisors (see below), whose sum is σ = 431114030368. Its totient is φ = 92381577912.

The previous prime is 215557015103. The next prime is 215557015169. The reversal of 215557015156 is 651510755512.

215557015156 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3849232386 + ... + 3849232441.

Almost surely, 2^215557015156 is an apocalyptic number.

It is an amenable number.

215557015156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

215557015156 is a wasteful number, since it uses less digits than its factorization.

215557015156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7698464838 (or 7698464836 counting only the distinct ones).

The product of its (nonzero) digits is 262500, while the sum is 43.

The spelling of 215557015156 in words is "two hundred fifteen billion, five hundred fifty-seven million, fifteen thousand, one hundred fifty-six".