115131 has 4 divisors (see below), whose sum is σ = 153512. Its totient is φ = 76752.

The previous prime is 115127. The next prime is 115133. The reversal of 115131 is 131511.

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

It is not a de Polignac number, because 115131 - 2² = 115127 is a prime.

It is a super-2 number, since 2×115131² = 26510294322, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

115131 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (115133) 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, 19186 + ... + 19191.

It is an arithmetic number, because the mean of its divisors is an integer number (38378).

2¹¹⁵¹³¹ is an apocalyptic number.

115131 is a deficient number, since it is larger than the sum of its proper divisors (38381).

115131 is an equidigital number, since it uses as much as digits as its factorization.

115131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38380.

The product of its digits is 15, while the sum is 12.

The square root of 115131 is about 339.3095931447. The cubic root of 115131 is about 48.6478993962.

Adding to 115131 its reverse (131511), we get a palindrome (246642).

The spelling of 115131 in words is "one hundred fifteen thousand, one hundred thirty-one".