22304513 has 8 divisors (see below), whose sum is σ = 27808320. Its totient is φ = 17380080.

The previous prime is 22304483. The next prime is 22304551. The reversal of 22304513 is 31540322.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22304513 - 2¹² = 22300417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22304413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144758 + ... + 144911.

It is an arithmetic number, because the mean of its divisors is an integer number (3476040).

Almost surely, 2^22304513 is an apocalyptic number.

It is an amenable number.

22304513 is a deficient number, since it is larger than the sum of its proper divisors (5503807).

22304513 is a wasteful number, since it uses less digits than its factorization.

22304513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289687.

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

The square root of 22304513 is about 4722.7653975187. The cubic root of 22304513 is about 281.4908279315.

Adding to 22304513 its reverse (31540322), we get a palindrome (53844835).

The spelling of 22304513 in words is "twenty-two million, three hundred four thousand, five hundred thirteen".