115213513 has 2 divisors, whose sum is σ = 115213514. Its totient is φ = 115213512.

The previous prime is 115213499. The next prime is 115213537. The reversal of 115213513 is 315312511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64689849 + 50523664 = 8043^2 + 7108^2 .

It is an emirp because it is prime and its reverse (315312511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115213513 - 2⁵ = 115213481 is a prime.

It is not a weakly prime, because it can be changed into another prime (115213543) 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, 57606756 + 57606757.

It is an arithmetic number, because the mean of its divisors is an integer number (57606757).

Almost surely, 2^115213513 is an apocalyptic number.

It is an amenable number.

115213513 is a deficient number, since it is larger than the sum of its proper divisors (1).

115213513 is an equidigital number, since it uses as much as digits as its factorization.

115213513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 22.

The square root of 115213513 is about 10733.7557732604. The cubic root of 115213513 is about 486.5951840862.

The spelling of 115213513 in words is "one hundred fifteen million, two hundred thirteen thousand, five hundred thirteen".