221555077652572 has 24 divisors (see below), whose sum is σ = 391282441254320. Its totient is φ = 109760115104640.

The previous prime is 221555077652501. The next prime is 221555077652603. The reversal of 221555077652572 is 275256770555122.

It is a self number, because there is not a number n which added to its sum of digits gives 221555077652572.

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, 41196247 + ... + 46262737.

Almost surely, 2^{221555077652572} is an apocalyptic number.

It is an amenable number.

221555077652572 is a deficient number, since it is larger than the sum of its proper divisors (169727363601748).

221555077652572 is a wasteful number, since it uses less digits than its factorization.

221555077652572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5166901 (or 5166899 counting only the distinct ones).

The product of its (nonzero) digits is 102900000, while the sum is 61.

The spelling of 221555077652572 in words is "two hundred twenty-one trillion, five hundred fifty-five billion, seventy-seven million, six hundred fifty-two thousand, five hundred seventy-two".