113220031 has 16 divisors (see below), whose sum is σ = 125647200. Its totient is φ = 101582208.

The previous prime is 113220013. The next prime is 113220043. The reversal of 113220031 is 130022311.

It is a de Polignac number, because none of the positive numbers 2^k-113220031 is a prime.

It is a super-2 number, since 2×113220031² = 25637550839281922, 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 = 113219993 and 113220020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113220001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27265 + ... + 31141.

It is an arithmetic number, because the mean of its divisors is an integer number (7852950).

Almost surely, 2^113220031 is an apocalyptic number.

113220031 is a deficient number, since it is larger than the sum of its proper divisors (12427169).

113220031 is a wasteful number, since it uses less digits than its factorization.

113220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 113220031 is about 10640.4901672808. The cubic root of 113220031 is about 483.7724025529.

Adding to 113220031 its reverse (130022311), we get a palindrome (243242342).

The spelling of 113220031 in words is "one hundred thirteen million, two hundred twenty thousand, thirty-one".