22004513 has 4 divisors (see below), whose sum is σ = 22714368. Its totient is φ = 21294660.

The previous prime is 22004497. The next prime is 22004539. The reversal of 22004513 is 31540022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22004513 - 2⁴ = 22004497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22004491 and 22004500.

It is not an unprimeable number, because it can be changed into a prime (22000513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354881 + ... + 354942.

It is an arithmetic number, because the mean of its divisors is an integer number (5678592).

Almost surely, 2^22004513 is an apocalyptic number.

It is an amenable number.

22004513 is a deficient number, since it is larger than the sum of its proper divisors (709855).

22004513 is an equidigital number, since it uses as much as digits as its factorization.

22004513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709854.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22004513 is about 4690.8968225703. The cubic root of 22004513 is about 280.2230917609.

Adding to 22004513 its reverse (31540022), we get a palindrome (53544535).

The spelling of 22004513 in words is "twenty-two million, four thousand, five hundred thirteen".