22521299531 has 2 divisors, whose sum is σ = 22521299532. Its totient is φ = 22521299530.

The previous prime is 22521299477. The next prime is 22521299609. The reversal of 22521299531 is 13599212522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22521299531 is a prime.

It is a super-2 number, since 2×22521299531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22521292531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260649765 + 11260649766.

It is an arithmetic number, because the mean of its divisors is an integer number (11260649766).

Almost surely, 2^22521299531 is an apocalyptic number.

22521299531 is a deficient number, since it is larger than the sum of its proper divisors (1).

22521299531 is an equidigital number, since it uses as much as digits as its factorization.

22521299531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The spelling of 22521299531 in words is "twenty-two billion, five hundred twenty-one million, two hundred ninety-nine thousand, five hundred thirty-one".