22252540 has 24 divisors (see below), whose sum is σ = 47994912. Its totient is φ = 8660160.

The previous prime is 22252537. The next prime is 22252547. The reversal of 22252540 is 4525222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22252547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14296 + ... + 15775.

It is an arithmetic number, because the mean of its divisors is an integer number (1999788).

Almost surely, 2^22252540 is an apocalyptic number.

22252540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22252540 is an abundant number, since it is smaller than the sum of its proper divisors (25742372).

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

22252540 is a wasteful number, since it uses less digits than its factorization.

22252540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30117 (or 30115 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 22252540 is about 4717.2597978063. The cubic root of 22252540 is about 281.2720186877.

Adding to 22252540 its reverse (4525222), we get a palindrome (26777762).

The spelling of 22252540 in words is "twenty-two million, two hundred fifty-two thousand, five hundred forty".