22531023021 has 16 divisors (see below), whose sum is σ = 32356579136. Its totient is φ = 13863384576.

The previous prime is 22531023001. The next prime is 22531023037. The reversal of 22531023021 is 12032013522.

It is not a de Polignac number, because 22531023021 - 2⁵ = 22531022989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22531023001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291186 + ... + 360348.

It is an arithmetic number, because the mean of its divisors is an integer number (2022286196).

Almost surely, 2^22531023021 is an apocalyptic number.

It is an amenable number.

22531023021 is a deficient number, since it is larger than the sum of its proper divisors (9825556115).

22531023021 is a wasteful number, since it uses less digits than its factorization.

22531023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77532.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 22531023021 its reverse (12032013522), we get a palindrome (34563036543).

The spelling of 22531023021 in words is "twenty-two billion, five hundred thirty-one million, twenty-three thousand, twenty-one".