215212136654 has 16 divisors (see below), whose sum is σ = 328366282320. Its totient is φ = 105759461760.

The previous prime is 215212136639. The next prime is 215212136677. The reversal of 215212136654 is 456631212512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530939 + ... + 843990.

It is an arithmetic number, because the mean of its divisors is an integer number (20522892645).

Almost surely, 2^215212136654 is an apocalyptic number.

215212136654 is a deficient number, since it is larger than the sum of its proper divisors (113154145666).

215212136654 is a wasteful number, since it uses less digits than its factorization.

215212136654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376275.

The product of its digits is 86400, while the sum is 38.

The spelling of 215212136654 in words is "two hundred fifteen billion, two hundred twelve million, one hundred thirty-six thousand, six hundred fifty-four".