115387231 has 4 divisors (see below), whose sum is σ = 116967952. Its totient is φ = 113806512.

The previous prime is 115387229. The next prime is 115387241. The reversal of 115387231 is 132783511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115387231 - 2¹ = 115387229 is a prime.

It is a super-2 number, since 2×115387231² = 26628426155694722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115387193 and 115387202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115387241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790251 + ... + 790396.

It is an arithmetic number, because the mean of its divisors is an integer number (29241988).

Almost surely, 2^115387231 is an apocalyptic number.

115387231 is a deficient number, since it is larger than the sum of its proper divisors (1580721).

115387231 is an equidigital number, since it uses as much as digits as its factorization.

115387231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580720.

The product of its digits is 5040, while the sum is 31.

The square root of 115387231 is about 10741.8448601718. The cubic root of 115387231 is about 486.8396226965.

It can be divided in two parts, 11538 and 7231, that added together give a square (18769 = 137²).

The spelling of 115387231 in words is "one hundred fifteen million, three hundred eighty-seven thousand, two hundred thirty-one".