215636513615252 has 6 divisors (see below), whose sum is σ = 377363898826698. Its totient is φ = 107818256807624.

The previous prime is 215636513615207. The next prime is 215636513615329. The reversal of 215636513615252 is 252516315636512.

215636513615252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 158605712703376 + 57030800911876 = 12593876^2 + 7551874^2 .

It is a super-2 number, since 2×215636513615252² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215636513615194 and 215636513615203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26954564201903 + ... + 26954564201910.

It is an arithmetic number, because the mean of its divisors is an integer number (62893983137783).

Almost surely, 2^{215636513615252} is an apocalyptic number.

It is an amenable number.

215636513615252 is a deficient number, since it is larger than the sum of its proper divisors (161727385211446).

215636513615252 is a wasteful number, since it uses less digits than its factorization.

215636513615252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53909128403817 (or 53909128403815 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 53.

The spelling of 215636513615252 in words is "two hundred fifteen trillion, six hundred thirty-six billion, five hundred thirteen million, six hundred fifteen thousand, two hundred fifty-two".