22521023 has 16 divisors (see below), whose sum is σ = 28032000. Its totient is φ = 17654112.

The previous prime is 22520999. The next prime is 22521041. The reversal of 22521023 is 32012522.

It is not a de Polignac number, because 22521023 - 2⁶ = 22520959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22520992 and 22521010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22521223) 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, 938 + ... + 6776.

It is an arithmetic number, because the mean of its divisors is an integer number (1752000).

Almost surely, 2^22521023 is an apocalyptic number.

22521023 is a deficient number, since it is larger than the sum of its proper divisors (5510977).

22521023 is a wasteful number, since it uses less digits than its factorization.

22521023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5894.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22521023 is about 4745.6319916319. The cubic root of 22521023 is about 282.3987075179.

Adding to 22521023 its reverse (32012522), we get a palindrome (54533545).

The spelling of 22521023 in words is "twenty-two million, five hundred twenty-one thousand, twenty-three".