22552531 has 4 divisors (see below), whose sum is σ = 23280064. Its totient is φ = 21825000.

The previous prime is 22552477. The next prime is 22552559. The reversal of 22552531 is 13525522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22552531 - 2¹⁷ = 22421459 is a prime.

It is a super-2 number, since 2×22552531² = 1017233309011922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22552496 and 22552505.

It is not an unprimeable number, because it can be changed into a prime (22552561) 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, 363720 + ... + 363781.

It is an arithmetic number, because the mean of its divisors is an integer number (5820016).

Almost surely, 2^22552531 is an apocalyptic number.

22552531 is the 3004-th centered pentagonal number.

22552531 is a deficient number, since it is larger than the sum of its proper divisors (727533).

22552531 is an equidigital number, since it uses as much as digits as its factorization.

22552531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727532.

The product of its digits is 3000, while the sum is 25.

The square root of 22552531 is about 4748.9505156403. The cubic root of 22552531 is about 282.5303426306.

The spelling of 22552531 in words is "twenty-two million, five hundred fifty-two thousand, five hundred thirty-one".