22257721040 has 40 divisors (see below), whose sum is σ = 51917822880. Its totient is φ = 8874078336.

The previous prime is 22257721033. The next prime is 22257721081. The reversal of 22257721040 is 4012775222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×22257721040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22257720988 and 22257721006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428570 + ... + 477689.

It is an arithmetic number, because the mean of its divisors is an integer number (1297945572).

Almost surely, 2^22257721040 is an apocalyptic number.

22257721040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22257721040 is an abundant number, since it is smaller than the sum of its proper divisors (29660101840).

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

22257721040 is a wasteful number, since it uses less digits than its factorization.

22257721040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906579 (or 906573 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The spelling of 22257721040 in words is "twenty-two billion, two hundred fifty-seven million, seven hundred twenty-one thousand, forty".