221477700892 has 12 divisors (see below), whose sum is σ = 442955401840. Its totient is φ = 94919014656.

The previous prime is 221477700749. The next prime is 221477700943. The reversal of 221477700892 is 298007774122.

221477700892 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3954958917 + ... + 3954958972.

Almost surely, 2^221477700892 is an apocalyptic number.

It is an amenable number.

221477700892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221477700892 is a wasteful number, since it uses less digits than its factorization.

221477700892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909917900 (or 7909917898 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 221477700892 in words is "two hundred twenty-one billion, four hundred seventy-seven million, seven hundred thousand, eight hundred ninety-two".