215251638087 has 16 divisors (see below), whose sum is σ = 291707806208. Its totient is φ = 141166735200.

The previous prime is 215251638083. The next prime is 215251638157. The reversal of 215251638087 is 780836152512.

It is not a de Polignac number, because 215251638087 - 2² = 215251638083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215251638083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2259988 + ... + 2353305.

It is an arithmetic number, because the mean of its divisors is an integer number (18231737888).

Almost surely, 2^215251638087 is an apocalyptic number.

215251638087 is a deficient number, since it is larger than the sum of its proper divisors (76456168121).

215251638087 is a wasteful number, since it uses less digits than its factorization.

215251638087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4613550.

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 215251638087 in words is "two hundred fifteen billion, two hundred fifty-one million, six hundred thirty-eight thousand, eighty-seven".