22506513 has 4 divisors (see below), whose sum is σ = 30008688. Its totient is φ = 15004340.

The previous prime is 22506511. The next prime is 22506541. The reversal of 22506513 is 31560522.

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 22506513 - 2¹ = 22506511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22506511) 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, 3751083 + ... + 3751088.

It is an arithmetic number, because the mean of its divisors is an integer number (7502172).

Almost surely, 2^22506513 is an apocalyptic number.

It is an amenable number.

22506513 is a deficient number, since it is larger than the sum of its proper divisors (7502175).

22506513 is an equidigital number, since it uses as much as digits as its factorization.

22506513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7502174.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 22506513 is about 4744.1029710579. The cubic root of 22506513 is about 282.3380458926.

The spelling of 22506513 in words is "twenty-two million, five hundred six thousand, five hundred thirteen".