22513144 has 8 divisors (see below), whose sum is σ = 42212160. Its totient is φ = 11256568.

The previous prime is 22513133. The next prime is 22513147. The reversal of 22513144 is 44131522.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22513147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1407064 + ... + 1407079.

It is an arithmetic number, because the mean of its divisors is an integer number (5276520).

Almost surely, 2^22513144 is an apocalyptic number.

It is an amenable number.

22513144 is a deficient number, since it is larger than the sum of its proper divisors (19699016).

22513144 is a wasteful number, since it uses less digits than its factorization.

22513144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814149 (or 2814145 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 22513144 is about 4744.8017872194. The cubic root of 22513144 is about 282.3657711967.

Adding to 22513144 its reverse (44131522), we get a palindrome (66644666).

The spelling of 22513144 in words is "twenty-two million, five hundred thirteen thousand, one hundred forty-four".