22775513 has 2 divisors, whose sum is σ = 22775514. Its totient is φ = 22775512.

The previous prime is 22775507. The next prime is 22775521. The reversal of 22775513 is 31557722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11539609 + 11235904 = 3397^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 22775513 - 2¹² = 22771417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22775513.

It is not a weakly prime, because it can be changed into another prime (22775573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11387756 + 11387757.

It is an arithmetic number, because the mean of its divisors is an integer number (11387757).

Almost surely, 2^22775513 is an apocalyptic number.

It is an amenable number.

22775513 is a deficient number, since it is larger than the sum of its proper divisors (1).

22775513 is an equidigital number, since it uses as much as digits as its factorization.

22775513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 32.

The square root of 22775513 is about 4772.3697467820. The cubic root of 22775513 is about 283.4584377937.

The spelling of 22775513 in words is "twenty-two million, seven hundred seventy-five thousand, five hundred thirteen".