22531525 has 12 divisors (see below), whose sum is σ = 28203552. Its totient is φ = 17854640.

The previous prime is 22531493. The next prime is 22531543. The reversal of 22531525 is 52513522.

It is a happy number.

It is not a de Polignac number, because 22531525 - 2⁵ = 22531493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22531525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1537 + ... + 6886.

It is an arithmetic number, because the mean of its divisors is an integer number (2350296).

Almost surely, 2^22531525 is an apocalyptic number.

22531525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22531525 is a deficient number, since it is larger than the sum of its proper divisors (5672027).

22531525 is a wasteful number, since it uses less digits than its factorization.

22531525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8540 (or 8535 counting only the distinct ones).

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

The square root of 22531525 is about 4746.7383538594. The cubic root of 22531525 is about 282.4425967372.

The spelling of 22531525 in words is "twenty-two million, five hundred thirty-one thousand, five hundred twenty-five".