113168581 has 4 divisors (see below), whose sum is σ = 114289164. Its totient is φ = 112048000.

The previous prime is 113168567. The next prime is 113168597. The reversal of 113168581 is 185861311.

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

It can be written as a sum of positive squares in 2 ways, for example, as 95452900 + 17715681 = 9770^2 + 4209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113168581 is a prime.

It is a super-2 number, since 2×113168581² = 25614255451107122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113168501) 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, 560140 + ... + 560341.

It is an arithmetic number, because the mean of its divisors is an integer number (28572291).

Almost surely, 2^113168581 is an apocalyptic number.

It is an amenable number.

113168581 is a deficient number, since it is larger than the sum of its proper divisors (1120583).

113168581 is a wasteful number, since it uses less digits than its factorization.

113168581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120582.

The product of its digits is 5760, while the sum is 34.

The square root of 113168581 is about 10638.0722407775. The cubic root of 113168581 is about 483.6991120434.

The spelling of 113168581 in words is "one hundred thirteen million, one hundred sixty-eight thousand, five hundred eighty-one".