115551251 has 2 divisors, whose sum is σ = 115551252. Its totient is φ = 115551250.

The previous prime is 115551221. The next prime is 115551253. The reversal of 115551251 is 152155511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115551251 is a prime.

Together with 115551253, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_6602327 and since 115551251 and 6602327 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115551251.

It is not a weakly prime, because it can be changed into another prime (115551253) 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 as a sum of consecutive naturals, namely, 57775625 + 57775626.

It is an arithmetic number, because the mean of its divisors is an integer number (57775626).

Almost surely, 2^115551251 is an apocalyptic number.

115551251 is a deficient number, since it is larger than the sum of its proper divisors (1).

115551251 is an equidigital number, since it uses as much as digits as its factorization.

115551251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1250, while the sum is 26.

The square root of 115551251 is about 10749.4767779646. The cubic root of 115551251 is about 487.0701901763.

The spelling of 115551251 in words is "one hundred fifteen million, five hundred fifty-one thousand, two hundred fifty-one".