22487513 has 2 divisors, whose sum is σ = 22487514. Its totient is φ = 22487512.

The previous prime is 22487501. The next prime is 22487519. The reversal of 22487513 is 31578422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16297369 + 6190144 = 4037^2 + 2488^2 .

It is a cyclic number.

It is not a de Polignac number, because 22487513 - 2¹⁸ = 22225369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22487513.

It is not a weakly prime, because it can be changed into another prime (22487519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11243756 + 11243757.

It is an arithmetic number, because the mean of its divisors is an integer number (11243757).

Almost surely, 2^22487513 is an apocalyptic number.

It is an amenable number.

22487513 is a deficient number, since it is larger than the sum of its proper divisors (1).

22487513 is an equidigital number, since it uses as much as digits as its factorization.

22487513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 32.

The square root of 22487513 is about 4742.1000622087. The cubic root of 22487513 is about 282.2585735916.

Subtracting 22487513 from its reverse (31578422), we obtain a palindrome (9090909).

The spelling of 22487513 in words is "twenty-two million, four hundred eighty-seven thousand, five hundred thirteen".