215167761513 has 96 divisors (see below), whose sum is σ = 339677245440. Its totient is φ = 130809427200.

The previous prime is 215167761493. The next prime is 215167761517. The reversal of 215167761513 is 315167761512.

215167761513 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 6 + 77 + 61 + 513 = 666.

It is not a de Polignac number, because 215167761513 - 2⁵ = 215167761481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215167761517) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 129852981 + ... + 129854637.

It is an arithmetic number, because the mean of its divisors is an integer number (3538304640).

Almost surely, 2^215167761513 is an apocalyptic number.

It is an amenable number.

215167761513 is a deficient number, since it is larger than the sum of its proper divisors (124509483927).

215167761513 is a wasteful number, since it uses less digits than its factorization.

215167761513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987 (or 1984 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

Subtracting 215167761513 from its reverse (315167761512), we obtain a palindrome (99999999999).

The spelling of 215167761513 in words is "two hundred fifteen billion, one hundred sixty-seven million, seven hundred sixty-one thousand, five hundred thirteen".