22523130 has 128 divisors (see below), whose sum is σ = 72783360. Its totient is φ = 4838400.

The previous prime is 22523119. The next prime is 22523173. The reversal of 22523130 is 3132522.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 31780 + ... + 32480.

It is an arithmetic number, because the mean of its divisors is an integer number (568620).

Almost surely, 2^22523130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22523130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36391680).

22523130 is an abundant number, since it is smaller than the sum of its proper divisors (50260230).

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

22523130 is a wasteful number, since it uses less digits than its factorization.

22523130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 22523130 is about 4745.8539800546. The cubic root of 22523130 is about 282.4075140379.

Adding to 22523130 its reverse (3132522), we get a palindrome (25655652).

The spelling of 22523130 in words is "twenty-two million, five hundred twenty-three thousand, one hundred thirty".