113239031 has 4 divisors (see below), whose sum is σ = 119199000. Its totient is φ = 107279064.

The previous prime is 113239019. The next prime is 113239033. The reversal of 113239031 is 130932311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130932311 = 41 ⋅3193471.

It is a cyclic number.

It is not a de Polignac number, because 113239031 - 2¹⁸ = 112976887 is a prime.

It is a super-2 number, since 2×113239031² = 25646156283637922, 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 = 113238988 and 113239006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113239033) 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, 2979956 + ... + 2979993.

It is an arithmetic number, because the mean of its divisors is an integer number (29799750).

Almost surely, 2^113239031 is an apocalyptic number.

113239031 is a deficient number, since it is larger than the sum of its proper divisors (5959969).

113239031 is an equidigital number, since it uses as much as digits as its factorization.

113239031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5959968.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 113239031 is about 10641.3829458393. The cubic root of 113239031 is about 483.7994624334.

The spelling of 113239031 in words is "one hundred thirteen million, two hundred thirty-nine thousand, thirty-one".