22523140 has 24 divisors (see below), whose sum is σ = 48930840. Its totient is φ = 8698368.

The previous prime is 22523119. The next prime is 22523173. The reversal of 22523140 is 4132522.

It can be written as a sum of positive squares in 4 ways, for example, as 695556 + 21827584 = 834^2 + 4672^2 .

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, 18837 + ... + 19996.

It is an arithmetic number, because the mean of its divisors is an integer number (2038785).

Almost surely, 2^22523140 is an apocalyptic number.

22523140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22523140 is an abundant number, since it is smaller than the sum of its proper divisors (26407700).

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

22523140 is a wasteful number, since it uses less digits than its factorization.

22523140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38871 (or 38869 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 22523140 is about 4745.8550336056. The cubic root of 22523140 is about 282.4075558331.

Adding to 22523140 its reverse (4132522), we get a palindrome (26655662).

The spelling of 22523140 in words is "twenty-two million, five hundred twenty-three thousand, one hundred forty".