115399231 has 2 divisors, whose sum is σ = 115399232. Its totient is φ = 115399230.

The previous prime is 115399223. The next prime is 115399253. The reversal of 115399231 is 132993511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115399231 - 2³ = 115399223 is a prime.

It is a super-2 number, since 2×115399231² = 26633965030782722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115399201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57699615 + 57699616.

It is an arithmetic number, because the mean of its divisors is an integer number (57699616).

Almost surely, 2^115399231 is an apocalyptic number.

115399231 is a deficient number, since it is larger than the sum of its proper divisors (1).

115399231 is an equidigital number, since it uses as much as digits as its factorization.

115399231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 34.

The square root of 115399231 is about 10742.4034089211. The cubic root of 115399231 is about 486.8564988358.

The spelling of 115399231 in words is "one hundred fifteen million, three hundred ninety-nine thousand, two hundred thirty-one".