115525309 has 2 divisors, whose sum is σ = 115525310. Its totient is φ = 115525308.

The previous prime is 115525303. The next prime is 115525327. The reversal of 115525309 is 903525511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96628900 + 18896409 = 9830^2 + 4347^2 .

It is a cyclic number.

It is not a de Polignac number, because 115525309 - 2⁷ = 115525181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115525303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57762654 + 57762655.

It is an arithmetic number, because the mean of its divisors is an integer number (57762655).

Almost surely, 2^115525309 is an apocalyptic number.

It is an amenable number.

115525309 is a deficient number, since it is larger than the sum of its proper divisors (1).

115525309 is an equidigital number, since it uses as much as digits as its factorization.

115525309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 115525309 is about 10748.2700468494. The cubic root of 115525309 is about 487.0337373168.

It can be divided in two parts, 11552 and 5309, that added together give a palindrome (16861).

The spelling of 115525309 in words is "one hundred fifteen million, five hundred twenty-five thousand, three hundred nine".