115205513 has 2 divisors, whose sum is σ = 115205514. Its totient is φ = 115205512.

The previous prime is 115205483. The next prime is 115205561. The reversal of 115205513 is 315502511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114982729 + 222784 = 10723^2 + 472^2 .

It is an emirp because it is prime and its reverse (315502511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115205513 is a prime.

It is not a weakly prime, because it can be changed into another prime (115205813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57602756 + 57602757.

It is an arithmetic number, because the mean of its divisors is an integer number (57602757).

Almost surely, 2^115205513 is an apocalyptic number.

It is an amenable number.

115205513 is a deficient number, since it is larger than the sum of its proper divisors (1).

115205513 is an equidigital number, since it uses as much as digits as its factorization.

115205513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 115205513 is about 10733.3831106506. The cubic root of 115205513 is about 486.5839213692.

The spelling of 115205513 in words is "one hundred fifteen million, two hundred five thousand, five hundred thirteen".