12515515222 has 24 divisors (see below), whose sum is σ = 22137464376. Its totient is φ = 5290312608.

The previous prime is 12515515211. The next prime is 12515515231. The reversal of 12515515222 is 22251551521.

It is a super-2 number, since 2×12515515222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 867568 + ... + 881875.

It is an arithmetic number, because the mean of its divisors is an integer number (922394349).

Almost surely, 2^12515515222 is an apocalyptic number.

12515515222 is a deficient number, since it is larger than the sum of its proper divisors (9621949154).

12515515222 is a wasteful number, since it uses less digits than its factorization.

12515515222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749532 (or 1749525 counting only the distinct ones).

The product of its digits is 10000, while the sum is 31.

The spelling of 12515515222 in words is "twelve billion, five hundred fifteen million, five hundred fifteen thousand, two hundred twenty-two".