22685513 has 2 divisors, whose sum is σ = 22685514. Its totient is φ = 22685512.

The previous prime is 22685501. The next prime is 22685519. The reversal of 22685513 is 31558622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21501769 + 1183744 = 4637^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 22685513 - 2¹⁶ = 22619977 is a prime.

It is equal to p_1429637 and since 22685513 and 1429637 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22685513.

It is not a weakly prime, because it can be changed into another prime (22685519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11342756 + 11342757.

It is an arithmetic number, because the mean of its divisors is an integer number (11342757).

Almost surely, 2^22685513 is an apocalyptic number.

It is an amenable number.

22685513 is a deficient number, since it is larger than the sum of its proper divisors (1).

22685513 is an equidigital number, since it uses as much as digits as its factorization.

22685513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 22685513 is about 4762.9311353409. The cubic root of 22685513 is about 283.0845722756.

The spelling of 22685513 in words is "twenty-two million, six hundred eighty-five thousand, five hundred thirteen".