221227932672 has 88 divisors (see below), whose sum is σ = 655170189200. Its totient is φ = 73742635008.

The previous prime is 221227932647. The next prime is 221227932743. The reversal of 221227932672 is 276239722122.

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, 3973147 + ... + 4028442.

Almost surely, 2^221227932672 is an apocalyptic number.

It is an amenable number.

221227932672 is an abundant number, since it is smaller than the sum of its proper divisors (433942256528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221227932672 is an equidigital number, since it uses as much as digits as its factorization.

221227932672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001618 (or 8001594 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The spelling of 221227932672 in words is "two hundred twenty-one billion, two hundred twenty-seven million, nine hundred thirty-two thousand, six hundred seventy-two".