113513231 has 4 divisors (see below), whose sum is σ = 122245032. Its totient is φ = 104781432.

The previous prime is 113513219. The next prime is 113513243. The reversal of 113513231 is 132315311.

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

It is an interprime number because it is at equal distance from previous prime (113513219) and next prime (113513243).

It is a cyclic number.

It is not a de Polignac number, because 113513231 - 2¹⁰ = 113512207 is a prime.

It is a super-2 number, since 2×113513231² = 25770507224118722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113513261) 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, 4365881 + ... + 4365906.

It is an arithmetic number, because the mean of its divisors is an integer number (30561258).

Almost surely, 2^113513231 is an apocalyptic number.

113513231 is a deficient number, since it is larger than the sum of its proper divisors (8731801).

113513231 is an equidigital number, since it uses as much as digits as its factorization.

113513231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8731800.

The product of its digits is 270, while the sum is 20.

The square root of 113513231 is about 10654.2588198335. The cubic root of 113513231 is about 484.1896426317.

Adding to 113513231 its reverse (132315311), we get a palindrome (245828542).

The spelling of 113513231 in words is "one hundred thirteen million, five hundred thirteen thousand, two hundred thirty-one".