22513232 has 20 divisors (see below), whose sum is σ = 49850976. Its totient is φ = 9648480.

The previous prime is 22513217. The next prime is 22513243. The reversal of 22513232 is 23231522.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100394 + ... + 100617.

Almost surely, 2^22513232 is an apocalyptic number.

It is an amenable number.

22513232 is an abundant number, since it is smaller than the sum of its proper divisors (27337744).

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

22513232 is a wasteful number, since it uses less digits than its factorization.

22513232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201026 (or 201020 counting only the distinct ones).

The product of its digits is 720, while the sum is 20.

The square root of 22513232 is about 4744.8110605165. The cubic root of 22513232 is about 282.3661391026.

Adding to 22513232 its reverse (23231522), we get a palindrome (45744754).

The spelling of 22513232 in words is "twenty-two million, five hundred thirteen thousand, two hundred thirty-two".