21975805224 has 32 divisors (see below), whose sum is σ = 61043904000. Its totient is φ = 7325268336.

The previous prime is 21975805153. The next prime is 21975805237. The reversal of 21975805224 is 42250857912.

21975805224 is a `hidden beast` number, since 2 + 19 + 7 + 580 + 52 + 2 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21975805224.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50869704 + ... + 50870135.

It is an arithmetic number, because the mean of its divisors is an integer number (1907622000).

Almost surely, 2^21975805224 is an apocalyptic number.

21975805224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21975805224 is an abundant number, since it is smaller than the sum of its proper divisors (39068098776).

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

21975805224 is a wasteful number, since it uses less digits than its factorization.

21975805224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101739854 (or 101739844 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 21975805224 in words is "twenty-one billion, nine hundred seventy-five million, eight hundred five thousand, two hundred twenty-four".