22563240 has 64 divisors (see below), whose sum is σ = 77362560. Its totient is φ = 5157120.

The previous prime is 22563221. The next prime is 22563251. The reversal of 22563240 is 4236522.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22563240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12591 + ... + 14270.

It is an arithmetic number, because the mean of its divisors is an integer number (1208790).

Almost surely, 2^22563240 is an apocalyptic number.

22563240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22563240 is an abundant number, since it is smaller than the sum of its proper divisors (54799320).

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

22563240 is a wasteful number, since it uses less digits than its factorization.

22563240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26882 (or 26878 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 22563240 is about 4750.0778940982. The cubic root of 22563240 is about 282.5750551090.

Adding to 22563240 its reverse (4236522), we get a palindrome (26799762).

The spelling of 22563240 in words is "twenty-two million, five hundred sixty-three thousand, two hundred forty".