22509013 has 2 divisors, whose sum is σ = 22509014. Its totient is φ = 22509012.

The previous prime is 22508953. The next prime is 22509029. The reversal of 22509013 is 31090522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 2241009 = 4502^2 + 1497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22509013 is a prime.

It is a super-3 number, since 3×22509013³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22509073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11254506 + 11254507.

It is an arithmetic number, because the mean of its divisors is an integer number (11254507).

Almost surely, 2^22509013 is an apocalyptic number.

It is an amenable number.

22509013 is a deficient number, since it is larger than the sum of its proper divisors (1).

22509013 is an equidigital number, since it uses as much as digits as its factorization.

22509013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 22509013 is about 4744.3664487474. The cubic root of 22509013 is about 282.3484994442.

Adding to 22509013 its reverse (31090522), we get a palindrome (53599535).

The spelling of 22509013 in words is "twenty-two million, five hundred nine thousand, thirteen".