22005513 has 20 divisors (see below), whose sum is σ = 33192720. Its totient is φ = 14527512.

The previous prime is 22005509. The next prime is 22005521. The reversal of 22005513 is 31550022.

It is a happy number.

It is not a de Polignac number, because 22005513 - 2² = 22005509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22005523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7398 + ... + 9936.

It is an arithmetic number, because the mean of its divisors is an integer number (1659636).

Almost surely, 2^22005513 is an apocalyptic number.

It is an amenable number.

22005513 is a deficient number, since it is larger than the sum of its proper divisors (11187207).

22005513 is a wasteful number, since it uses less digits than its factorization.

22005513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 22005513 is about 4691.0034107854. The cubic root of 22005513 is about 280.2273366302.

Adding to 22005513 its reverse (31550022), we get a palindrome (53555535).

The spelling of 22005513 in words is "twenty-two million, five thousand, five hundred thirteen".