113305231 has 4 divisors (see below), whose sum is σ = 122021032. Its totient is φ = 104589432.

The previous prime is 113305207. The next prime is 113305237. The reversal of 113305231 is 132503311.

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 113305231 - 2¹³ = 113297039 is a prime.

It is a super-2 number, since 2×113305231² = 25676150743926722, 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 = 113305199 and 113305208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113305237) 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, 4357881 + ... + 4357906.

It is an arithmetic number, because the mean of its divisors is an integer number (30505258).

Almost surely, 2^113305231 is an apocalyptic number.

113305231 is a deficient number, since it is larger than the sum of its proper divisors (8715801).

113305231 is an equidigital number, since it uses as much as digits as its factorization.

113305231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715800.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 113305231 is about 10644.4929893349. The cubic root of 113305231 is about 483.8937211150.

Adding to 113305231 its reverse (132503311), we get a palindrome (245808542).

It can be divided in two parts, 11330 and 5231, that added together give a palindrome (16561).

The spelling of 113305231 in words is "one hundred thirteen million, three hundred five thousand, two hundred thirty-one".