215167512231 has 18 divisors (see below), whose sum is σ = 361539970272. Its totient is φ = 122952863880.

The previous prime is 215167512151. The next prime is 215167512251. The reversal of 215167512231 is 132215761512.

215167512231 is a `hidden beast` number, since 2 + 1 + 51 + 67 + 512 + 2 + 31 = 666.

It is not a de Polignac number, because 215167512231 - 2⁷ = 215167512103 is a prime.

It is a super-2 number, since 2×215167512231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215167512251) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 243953655 + ... + 243954536.

It is an arithmetic number, because the mean of its divisors is an integer number (20085553904).

Almost surely, 2^215167512231 is an apocalyptic number.

215167512231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

215167512231 is a deficient number, since it is larger than the sum of its proper divisors (146372458041).

215167512231 is a wasteful number, since it uses less digits than its factorization.

215167512231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487908211 (or 487908201 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The spelling of 215167512231 in words is "two hundred fifteen billion, one hundred sixty-seven million, five hundred twelve thousand, two hundred thirty-one".