22510856621 has 4 divisors (see below), whose sum is σ = 24557298144. Its totient is φ = 20464415100.

The previous prime is 22510856611. The next prime is 22510856633. The reversal of 22510856621 is 12665801522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22510856621 - 2²² = 22506662317 is a prime.

It is a super-2 number, since 2×22510856621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22510856611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1023220745 + ... + 1023220766.

It is an arithmetic number, because the mean of its divisors is an integer number (6139324536).

Almost surely, 2^22510856621 is an apocalyptic number.

It is an amenable number.

22510856621 is a deficient number, since it is larger than the sum of its proper divisors (2046441523).

22510856621 is a wasteful number, since it uses less digits than its factorization.

22510856621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046441522.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 22510856621 in words is "twenty-two billion, five hundred ten million, eight hundred fifty-six thousand, six hundred twenty-one".