22513712 has 40 divisors (see below), whose sum is σ = 49746816. Its totient is φ = 9778176.

The previous prime is 22513693. The next prime is 22513721. The reversal of 22513712 is 21731522.

It is a happy number.

It is a congruent number.

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, 353 + ... + 6719.

Almost surely, 2^22513712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22513712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24873408).

22513712 is an abundant number, since it is smaller than the sum of its proper divisors (27233104).

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

22513712 is a wasteful number, since it uses less digits than its factorization.

22513712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405 (or 6399 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 22513712 is about 4744.8616418184. The cubic root of 22513712 is about 282.3681458452.

The spelling of 22513712 in words is "twenty-two million, five hundred thirteen thousand, seven hundred twelve".