22508145 has 64 divisors (see below), whose sum is σ = 45619200. Its totient is φ = 10422720.

The previous prime is 22508137. The next prime is 22508203. The reversal of 22508145 is 54180522.

It is a happy number.

It is not a de Polignac number, because 22508145 - 2³ = 22508137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Together with 23111055 it forms an amicable pair .

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33826 + ... + 34484.

It is an arithmetic number, because the mean of its divisors is an integer number (712800).

Almost surely, 2^22508145 is an apocalyptic number.

It is an amenable number.

22508145 is an abundant number, since it is smaller than the sum of its proper divisors (23111055).

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

22508145 is a wasteful number, since it uses less digits than its factorization.

22508145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 22508145 is about 4744.2749709518. The cubic root of 22508145 is about 282.3448700588.

Adding to 22508145 its reverse (54180522), we get a palindrome (76688667).

The spelling of 22508145 in words is "twenty-two million, five hundred eight thousand, one hundred forty-five".