115511257 has 2 divisors, whose sum is σ = 115511258. Its totient is φ = 115511256.

The previous prime is 115511251. The next prime is 115511269. The reversal of 115511257 is 752115511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72948681 + 42562576 = 8541^2 + 6524^2 .

It is a cyclic number.

It is not a de Polignac number, because 115511257 - 2¹¹ = 115509209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115511251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57755628 + 57755629.

It is an arithmetic number, because the mean of its divisors is an integer number (57755629).

Almost surely, 2^115511257 is an apocalyptic number.

It is an amenable number.

115511257 is a deficient number, since it is larger than the sum of its proper divisors (1).

115511257 is an equidigital number, since it uses as much as digits as its factorization.

115511257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1750, while the sum is 28.

The square root of 115511257 is about 10747.6163403799. The cubic root of 115511257 is about 487.0139896221.

Adding to 115511257 its reverse (752115511), we get a palindrome (867626768).

The spelling of 115511257 in words is "one hundred fifteen million, five hundred eleven thousand, two hundred fifty-seven".