22921553 has 4 divisors (see below), whose sum is σ = 22943088. Its totient is φ = 22900020.

The previous prime is 22921511. The next prime is 22921601. The reversal of 22921553 is 35512922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22921553 - 2¹⁰ = 22920529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22921153) 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, 9083 + ... + 11328.

It is an arithmetic number, because the mean of its divisors is an integer number (5735772).

Almost surely, 2^22921553 is an apocalyptic number.

It is an amenable number.

22921553 is a deficient number, since it is larger than the sum of its proper divisors (21535).

22921553 is a wasteful number, since it uses less digits than its factorization.

22921553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21534.

The product of its digits is 5400, while the sum is 29.

The square root of 22921553 is about 4787.6458724513. The cubic root of 22921553 is about 284.0630067506.

The spelling of 22921553 in words is "twenty-two million, nine hundred twenty-one thousand, five hundred fifty-three".