113531181 has 8 divisors (see below), whose sum is σ = 151938720. Its totient is φ = 75405552.

The previous prime is 113531161. The next prime is 113531189. The reversal of 113531181 is 181135311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 113531181 - 2²⁶ = 46422317 is a prime.

It is a super-2 number, since 2×113531181² = 25778658118509522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113531189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69535 + ... + 71148.

It is an arithmetic number, because the mean of its divisors is an integer number (18992340).

Almost surely, 2^113531181 is an apocalyptic number.

It is an amenable number.

113531181 is a deficient number, since it is larger than the sum of its proper divisors (38407539).

113531181 is a wasteful number, since it uses less digits than its factorization.

113531181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140955.

The product of its digits is 360, while the sum is 24.

The square root of 113531181 is about 10655.1011726778. The cubic root of 113531181 is about 484.2151631398.

Adding to 113531181 its reverse (181135311), we get a palindrome (294666492).

The spelling of 113531181 in words is "one hundred thirteen million, five hundred thirty-one thousand, one hundred eighty-one".