22521055 has 4 divisors (see below), whose sum is σ = 27025272. Its totient is φ = 18016840.

The previous prime is 22521041. The next prime is 22521089. The reversal of 22521055 is 55012522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55012522 = 2 ⋅27506261.

It is not a de Polignac number, because 22521055 - 2⁹ = 22520543 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252101 + ... + 2252110.

It is an arithmetic number, because the mean of its divisors is an integer number (6756318).

Almost surely, 2^22521055 is an apocalyptic number.

22521055 is a deficient number, since it is larger than the sum of its proper divisors (4504217).

22521055 is an equidigital number, since it uses as much as digits as its factorization.

22521055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504216.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 22521055 is about 4745.6353631521. The cubic root of 22521055 is about 282.3988412708.

Adding to 22521055 its reverse (55012522), we get a palindrome (77533577).

The spelling of 22521055 in words is "twenty-two million, five hundred twenty-one thousand, fifty-five".