22553 has 4 divisors (see below), whose sum is σ = 23760. Its totient is φ = 21348.

The previous prime is 22549. The next prime is 22567. The reversal of 22553 is 35522.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35522 = 2 ⋅17761.

It is a cyclic number.

It is not a de Polignac number, because 22553 - 2² = 22549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22543) 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, 575 + ... + 612.

It is an arithmetic number, because the mean of its divisors is an integer number (5940).

2²²⁵⁵³ is an apocalyptic number.

It is an amenable number.

22553 is a deficient number, since it is larger than the sum of its proper divisors (1207).

22553 is a wasteful number, since it uses less digits than its factorization.

22553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206.

The product of its digits is 300, while the sum is 17.

The square root of 22553 is about 150.1765627520. The cubic root of 22553 is about 28.2532301107.

It can be divided in two parts, 22 and 553, that added together give a palindrome (575).

The spelling of 22553 in words is "twenty-two thousand, five hundred fifty-three".