221653230347672 has 8 divisors (see below), whose sum is σ = 415599806901900. Its totient is φ = 110826615173832.

The previous prime is 221653230347557. The next prime is 221653230347713. The reversal of 221653230347672 is 276743032356122.

221653230347672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13853326896722 + ... + 13853326896737.

Almost surely, 2^{221653230347672} is an apocalyptic number.

It is an amenable number.

221653230347672 is a deficient number, since it is larger than the sum of its proper divisors (193946576554228).

221653230347672 is a wasteful number, since it uses less digits than its factorization.

221653230347672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27706653793465 (or 27706653793461 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 53.

The spelling of 221653230347672 in words is "two hundred twenty-one trillion, six hundred fifty-three billion, two hundred thirty million, three hundred forty-seven thousand, six hundred seventy-two".