22645513 has 24 divisors (see below), whose sum is σ = 26860680. Its totient is φ = 19008000.

The previous prime is 22645507. The next prime is 22645541. The reversal of 22645513 is 31554622.

It can be written as a sum of positive squares in 4 ways, for example, as 14653584 + 7991929 = 3828^2 + 2827^2 .

It is not a de Polignac number, because 22645513 - 2⁵ = 22645481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22645583) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 207703 + ... + 207811.

It is an arithmetic number, because the mean of its divisors is an integer number (1119195).

Almost surely, 2^22645513 is an apocalyptic number.

It is an amenable number.

22645513 is a deficient number, since it is larger than the sum of its proper divisors (4215167).

22645513 is a wasteful number, since it uses less digits than its factorization.

22645513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 238 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 22645513 is about 4758.7301877707. The cubic root of 22645513 is about 282.9180923919.

It can be divided in two parts, 2264 and 5513, that added together give a palindrome (7777).

The spelling of 22645513 in words is "twenty-two million, six hundred forty-five thousand, five hundred thirteen".