215813012715 has 16 divisors (see below), whose sum is σ = 383667578400. Its totient is φ = 115100273376.

The previous prime is 215813012713. The next prime is 215813012749. The reversal of 215813012715 is 517210318512.

215813012715 is a `hidden beast` number, since 2 + 1 + 5 + 81 + 301 + 271 + 5 = 666.

It is not a de Polignac number, because 215813012715 - 2¹ = 215813012713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215813012715.

It is not an unprimeable number, because it can be changed into a prime (215813012711) 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, 799307320 + ... + 799307589.

It is an arithmetic number, because the mean of its divisors is an integer number (23979223650).

Almost surely, 2^215813012715 is an apocalyptic number.

215813012715 is a deficient number, since it is larger than the sum of its proper divisors (167854565685).

215813012715 is a wasteful number, since it uses less digits than its factorization.

215813012715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598614923 (or 1598614917 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The spelling of 215813012715 in words is "two hundred fifteen billion, eight hundred thirteen million, twelve thousand, seven hundred fifteen".