115313561 has 4 divisors (see below), whose sum is σ = 125796624. Its totient is φ = 104830500.

The previous prime is 115313557. The next prime is 115313563. The reversal of 115313561 is 165313511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115313561 - 2² = 115313557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115313561.

It is not an unprimeable number, because it can be changed into a prime (115313563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5241515 + ... + 5241536.

It is an arithmetic number, because the mean of its divisors is an integer number (31449156).

Almost surely, 2^115313561 is an apocalyptic number.

115313561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115313561 is a deficient number, since it is larger than the sum of its proper divisors (10483063).

115313561 is a wasteful number, since it uses less digits than its factorization.

115313561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10483062.

The product of its digits is 1350, while the sum is 26.

The square root of 115313561 is about 10738.4151996465. The cubic root of 115313561 is about 486.7359916151.

The spelling of 115313561 in words is "one hundred fifteen million, three hundred thirteen thousand, five hundred sixty-one".