215205522015 has 48 divisors (see below), whose sum is σ = 377823957120. Its totient is φ = 103736557440.

The previous prime is 215205521987. The next prime is 215205522053. The reversal of 215205522015 is 510225502512.

It is not a de Polignac number, because 215205522015 - 2⁸ = 215205521759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4916496 + ... + 4960074.

It is an arithmetic number, because the mean of its divisors is an integer number (7871332440).

Almost surely, 2^215205522015 is an apocalyptic number.

215205522015 is a deficient number, since it is larger than the sum of its proper divisors (162618435105).

215205522015 is a wasteful number, since it uses less digits than its factorization.

215205522015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43944 (or 43771 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 215205522015 in words is "two hundred fifteen billion, two hundred five million, five hundred twenty-two thousand, fifteen".