22522440 has 32 divisors (see below), whose sum is σ = 67567680. Its totient is φ = 6005952.

The previous prime is 22522439. The next prime is 22522453. The reversal of 22522440 is 4422522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93724 + ... + 93963.

It is an arithmetic number, because the mean of its divisors is an integer number (2111490).

Almost surely, 2^22522440 is an apocalyptic number.

22522440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22522440 is an abundant number, since it is smaller than the sum of its proper divisors (45045240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22522440 is a wasteful number, since it uses less digits than its factorization.

22522440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187701 (or 187697 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 22522440 is about 4745.7812844673. The cubic root of 22522440 is about 282.4046301407.

Adding to 22522440 its reverse (4422522), we get a palindrome (26944962).

The spelling of 22522440 in words is "twenty-two million, five hundred twenty-two thousand, four hundred forty".