21222765675 has 72 divisors (see below), whose sum is σ = 38320270560. Its totient is φ = 11227507200.

The previous prime is 21222765647. The next prime is 21222765691. The reversal of 21222765675 is 57656722212.

21222765675 is a `hidden beast` number, since 2 + 12 + 2 + 2 + 76 + 567 + 5 = 666.

It is not a de Polignac number, because 21222765675 - 2⁶ = 21222765611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21222765675.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 23092866 + ... + 23093784.

It is an arithmetic number, because the mean of its divisors is an integer number (532225980).

Almost surely, 2^21222765675 is an apocalyptic number.

21222765675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21222765675 is a deficient number, since it is larger than the sum of its proper divisors (17097504885).

21222765675 is a wasteful number, since it uses less digits than its factorization.

21222765675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1645 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The spelling of 21222765675 in words is "twenty-one billion, two hundred twenty-two million, seven hundred sixty-five thousand, six hundred seventy-five".