113115731 has 4 divisors (see below), whose sum is σ = 114153600. Its totient is φ = 112077864.

The previous prime is 113115703. The next prime is 113115767. The reversal of 113115731 is 137511311.

It is a happy number.

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 113115731 - 2²² = 108921427 is a prime.

It is a super-2 number, since 2×113115731² = 25590337199328722, 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 = 113115697 and 113115706.

It is not an unprimeable number, because it can be changed into a prime (113115781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518771 + ... + 518988.

It is an arithmetic number, because the mean of its divisors is an integer number (28538400).

Almost surely, 2^113115731 is an apocalyptic number.

113115731 is a deficient number, since it is larger than the sum of its proper divisors (1037869).

113115731 is a wasteful number, since it uses less digits than its factorization.

113115731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037868.

The product of its digits is 315, while the sum is 23.

The square root of 113115731 is about 10635.5879480168. The cubic root of 113115731 is about 483.6238041023.

The spelling of 113115731 in words is "one hundred thirteen million, one hundred fifteen thousand, seven hundred thirty-one".