22491023521 has 8 divisors (see below), whose sum is σ = 22796595360. Its totient is φ = 22186275552.

The previous prime is 22491023519. The next prime is 22491023561. The reversal of 22491023521 is 12532019422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22491023521 - 2¹ = 22491023519 is a prime.

It is a super-2 number, since 2×22491023521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22491023561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150900 + ... + 260293.

It is an arithmetic number, because the mean of its divisors is an integer number (2849574420).

Almost surely, 2^22491023521 is an apocalyptic number.

It is an amenable number.

22491023521 is a deficient number, since it is larger than the sum of its proper divisors (305571839).

22491023521 is an equidigital number, since it uses as much as digits as its factorization.

22491023521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411935.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 22491023521 in words is "twenty-two billion, four hundred ninety-one million, twenty-three thousand, five hundred twenty-one".