221902763823 has 48 divisors (see below), whose sum is σ = 348950923776. Its totient is φ = 135066286080.

The previous prime is 221902763743. The next prime is 221902763843. The reversal of 221902763823 is 328367209122.

221902763823 is a `hidden beast` number, since 2 + 2 + 1 + 9 + 0 + 2 + 7 + 638 + 2 + 3 = 666.

It is not a de Polignac number, because 221902763823 - 2²⁶ = 221835654959 is a prime.

It is a super-2 number, since 2×221902763823² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221902763843) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22659058 + ... + 22668848.

It is an arithmetic number, because the mean of its divisors is an integer number (7269810912).

Almost surely, 2^221902763823 is an apocalyptic number.

221902763823 is a deficient number, since it is larger than the sum of its proper divisors (127048159953).

221902763823 is a wasteful number, since it uses less digits than its factorization.

221902763823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11904 (or 11901 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 221902763823 in words is "two hundred twenty-one billion, nine hundred two million, seven hundred sixty-three thousand, eight hundred twenty-three".