221534461776023 has 12 divisors (see below), whose sum is σ = 251901539612520. Its totient is φ = 194450311273680.

The previous prime is 221534461775989. The next prime is 221534461776037. The reversal of 221534461776023 is 320677164435122.

It is a de Polignac number, because none of the positive numbers 2^k-221534461776023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221534461776623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31566605465 + ... + 31566612482.

It is an arithmetic number, because the mean of its divisors is an integer number (20991794967710).

Almost surely, 2^{221534461776023} is an apocalyptic number.

221534461776023 is a deficient number, since it is larger than the sum of its proper divisors (30367077836497).

221534461776023 is a wasteful number, since it uses less digits than its factorization.

221534461776023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63133217998 (or 63133217987 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 221534461776023 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred sixty-one million, seven hundred seventy-six thousand, twenty-three".