115511251 has 2 divisors, whose sum is σ = 115511252. Its totient is φ = 115511250.

The previous prime is 115511237. The next prime is 115511257. The reversal of 115511251 is 152115511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115511251 - 2⁹ = 115510739 is a prime.

It is not a weakly prime, because it can be changed into another prime (115511257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57755625 + 57755626.

It is an arithmetic number, because the mean of its divisors is an integer number (57755626).

Almost surely, 2^115511251 is an apocalyptic number.

115511251 is a deficient number, since it is larger than the sum of its proper divisors (1).

115511251 is an equidigital number, since it uses as much as digits as its factorization.

115511251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250, while the sum is 22.

The square root of 115511251 is about 10747.6160612482. The cubic root of 115511251 is about 487.0139811898.

Adding to 115511251 its reverse (152115511), we get a palindrome (267626762).

The spelling of 115511251 in words is "one hundred fifteen million, five hundred eleven thousand, two hundred fifty-one".