115806251 has 16 divisors (see below), whose sum is σ = 132507360. Its totient is φ = 100235520.

The previous prime is 115806191. The next prime is 115806269. The reversal of 115806251 is 152608511.

It is not a de Polignac number, because 115806251 - 2²⁶ = 48697387 is a prime.

It is a super-2 number, since 2×115806251² = 26822175541350002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115806281) 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 in 15 ways as a sum of consecutive naturals, for example, 20801 + ... + 25773.

It is an arithmetic number, because the mean of its divisors is an integer number (8281710).

Almost surely, 2^115806251 is an apocalyptic number.

115806251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115806251 is a deficient number, since it is larger than the sum of its proper divisors (16701109).

115806251 is a wasteful number, since it uses less digits than its factorization.

115806251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 115806251 is about 10761.3312838143. The cubic root of 115806251 is about 487.4282178771.

The spelling of 115806251 in words is "one hundred fifteen million, eight hundred six thousand, two hundred fifty-one".