22531165531 has 4 divisors (see below), whose sum is σ = 25749903472. Its totient is φ = 19312427592.

The previous prime is 22531165511. The next prime is 22531165541. The reversal of 22531165531 is 13556113522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22531165531 - 2¹⁵ = 22531132763 is a prime.

It is a super-2 number, since 2×22531165531² (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 (22531165511) 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, 1609368960 + ... + 1609368973.

It is an arithmetic number, because the mean of its divisors is an integer number (6437475868).

Almost surely, 2^22531165531 is an apocalyptic number.

22531165531 is a deficient number, since it is larger than the sum of its proper divisors (3218737941).

22531165531 is an equidigital number, since it uses as much as digits as its factorization.

22531165531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218737940.

The product of its digits is 27000, while the sum is 34.

The spelling of 22531165531 in words is "twenty-two billion, five hundred thirty-one million, one hundred sixty-five thousand, five hundred thirty-one".