215523034564 has 6 divisors (see below), whose sum is σ = 377165310494. Its totient is φ = 107761517280.

The previous prime is 215523034549. The next prime is 215523034567. The reversal of 215523034564 is 465430325512.

It can be written as a sum of positive squares in only one way, i.e., 208856312064 + 6666722500 = 457008^2 + 81650^2 .

It is not an unprimeable number, because it can be changed into a prime (215523034567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26940379317 + ... + 26940379324.

Almost surely, 2^215523034564 is an apocalyptic number.

It is an amenable number.

215523034564 is a deficient number, since it is larger than the sum of its proper divisors (161642275930).

215523034564 is a wasteful number, since it uses less digits than its factorization.

215523034564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53880758645 (or 53880758643 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 215523034564 in words is "two hundred fifteen billion, five hundred twenty-three million, thirty-four thousand, five hundred sixty-four".