113815531 has 4 divisors (see below), whose sum is σ = 114142000. Its totient is φ = 113489064.

The previous prime is 113815483. The next prime is 113815547. The reversal of 113815531 is 135518311.

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 113815531 - 2⁹ = 113815019 is a prime.

It is a super-2 number, since 2×113815531² = 25907950193623922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113815531.

It is not an unprimeable number, because it can be changed into a prime (113815591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162711 + ... + 163408.

It is an arithmetic number, because the mean of its divisors is an integer number (28535500).

Almost surely, 2^113815531 is an apocalyptic number.

113815531 is a deficient number, since it is larger than the sum of its proper divisors (326469).

113815531 is an equidigital number, since it uses as much as digits as its factorization.

113815531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326468.

The product of its digits is 1800, while the sum is 28.

The square root of 113815531 is about 10668.4362021807. The cubic root of 113815531 is about 484.6190809306.

The spelling of 113815531 in words is "one hundred thirteen million, eight hundred fifteen thousand, five hundred thirty-one".