22545013 has 2 divisors, whose sum is σ = 22545014. Its totient is φ = 22545012.

The previous prime is 22544987. The next prime is 22545053. The reversal of 22545013 is 31054522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16184529 + 6360484 = 4023^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 22545013 - 2¹³ = 22536821 is a prime.

It is a super-2 number, since 2×22545013² = 1016555222340338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22545053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11272506 + 11272507.

It is an arithmetic number, because the mean of its divisors is an integer number (11272507).

Almost surely, 2^22545013 is an apocalyptic number.

It is an amenable number.

22545013 is a deficient number, since it is larger than the sum of its proper divisors (1).

22545013 is an equidigital number, since it uses as much as digits as its factorization.

22545013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 22545013 is about 4748.1589063552. The cubic root of 22545013 is about 282.4989448364.

Adding to 22545013 its reverse (31054522), we get a palindrome (53599535).

The spelling of 22545013 in words is "twenty-two million, five hundred forty-five thousand, thirteen".