22553121 has 4 divisors (see below), whose sum is σ = 30070832. Its totient is φ = 15035412.

The previous prime is 22553107. The next prime is 22553123. The reversal of 22553121 is 12135522.

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 not a de Polignac number, because 22553121 - 2⁹ = 22552609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22553123) 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, 3758851 + ... + 3758856.

It is an arithmetic number, because the mean of its divisors is an integer number (7517708).

Almost surely, 2^22553121 is an apocalyptic number.

It is an amenable number.

22553121 is a deficient number, since it is larger than the sum of its proper divisors (7517711).

22553121 is an equidigital number, since it uses as much as digits as its factorization.

22553121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7517710.

The product of its digits is 600, while the sum is 21.

The square root of 22553121 is about 4749.0126342220. The cubic root of 22553121 is about 282.5328063814.

Adding to 22553121 its reverse (12135522), we get a palindrome (34688643).

The spelling of 22553121 in words is "twenty-two million, five hundred fifty-three thousand, one hundred twenty-one".