215204064433251 has 16 divisors (see below), whose sum is σ = 296195234024448. Its totient is φ = 138841147836000.

The previous prime is 215204064433217. The next prime is 215204064433387. The reversal of 215204064433251 is 152334460402512.

It is not a de Polignac number, because 215204064433251 - 2¹⁷ = 215204064302179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215204068433251) 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, 123523101 + ... + 125253201.

It is an arithmetic number, because the mean of its divisors is an integer number (18512202126528).

Almost surely, 2^{215204064433251} is an apocalyptic number.

215204064433251 is a deficient number, since it is larger than the sum of its proper divisors (80991169591197).

215204064433251 is a wasteful number, since it uses less digits than its factorization.

215204064433251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067642.

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 215204064433251 in words is "two hundred fifteen trillion, two hundred four billion, sixty-four million, four hundred thirty-three thousand, two hundred fifty-one".