22518475 has 12 divisors (see below), whose sum is σ = 31912144. Its totient is φ = 15441120.

The previous prime is 22518451. The next prime is 22518491. The reversal of 22518475 is 57481522.

It is a happy number.

It is not a de Polignac number, because 22518475 - 2⁵ = 22518443 is a prime.

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 22518475.

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, 64164 + ... + 64513.

Almost surely, 2^22518475 is an apocalyptic number.

22518475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22518475 is a deficient number, since it is larger than the sum of its proper divisors (9393669).

22518475 is a wasteful number, since it uses less digits than its factorization.

22518475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128694 (or 128689 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 22518475 is about 4745.3635266437. The cubic root of 22518475 is about 282.3880570389.

Adding to 22518475 its reverse (57481522), we get a palindrome (79999997).

The spelling of 22518475 in words is "twenty-two million, five hundred eighteen thousand, four hundred seventy-five".