115813251 has 12 divisors (see below), whose sum is σ = 167464128. Its totient is φ = 77126544.

The previous prime is 115813249. The next prime is 115813253. The reversal of 115813251 is 152318511.

115813251 is a `hidden beast` number, since 1 + 1 + 581 + 32 + 51 = 666.

It is an interprime number because it is at equal distance from previous prime (115813249) and next prime (115813253).

It is not a de Polignac number, because 115813251 - 2¹ = 115813249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115813253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2766 + ... + 15468.

It is an arithmetic number, because the mean of its divisors is an integer number (13955344).

Almost surely, 2^115813251 is an apocalyptic number.

115813251 is a deficient number, since it is larger than the sum of its proper divisors (51650877).

115813251 is a wasteful number, since it uses less digits than its factorization.

115813251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13722 (or 13719 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 115813251 is about 10761.6565174698. The cubic root of 115813251 is about 487.4380386734.

The spelling of 115813251 in words is "one hundred fifteen million, eight hundred thirteen thousand, two hundred fifty-one".