115731 has 24 divisors (see below), whose sum is σ = 209664. Its totient is φ = 59760.

The previous prime is 115727. The next prime is 115733. The reversal of 115731 is 137511.

It is a happy number.

It is not a de Polignac number, because 115731 - 2² = 115727 is a prime.

It is a super-2 number, since 2×115731² = 26787328722, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 610 + ... + 776.

It is an arithmetic number, because the mean of its divisors is an integer number (8736).

2¹¹⁵⁷³¹ is an apocalyptic number.

115731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115731 is a deficient number, since it is larger than the sum of its proper divisors (93933).

115731 is a wasteful number, since it uses less digits than its factorization.

115731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 188 counting only the distinct ones).

The product of its digits is 105, while the sum is 18.

The square root of 115731 is about 340.1925925119. The cubic root of 115731 is about 48.7322617911.

The spelling of 115731 in words is "one hundred fifteen thousand, seven hundred thirty-one".