113161331 has 4 divisors (see below), whose sum is σ = 113735952. Its totient is φ = 112586712.

The previous prime is 113161327. The next prime is 113161339. The reversal of 113161331 is 133161311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133161311 = 10613 ⋅12547.

It is a cyclic number.

It is not a de Polignac number, because 113161331 - 2² = 113161327 is a prime.

It is a super-2 number, since 2×113161331² = 25610973667383122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113161339) 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, 287015 + ... + 287408.

It is an arithmetic number, because the mean of its divisors is an integer number (28433988).

Almost surely, 2^113161331 is an apocalyptic number.

113161331 is a deficient number, since it is larger than the sum of its proper divisors (574621).

113161331 is an equidigital number, since it uses as much as digits as its factorization.

113161331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574620.

The product of its digits is 162, while the sum is 20.

The square root of 113161331 is about 10637.7314780925. The cubic root of 113161331 is about 483.6887826351.

Subtracting from 113161331 its sum of digits (20), we obtain a palindrome (113161311).

The spelling of 113161331 in words is "one hundred thirteen million, one hundred sixty-one thousand, three hundred thirty-one".