113432531 has 4 divisors (see below), whose sum is σ = 114799272. Its totient is φ = 112065792.

The previous prime is 113432513. The next prime is 113432537. The reversal of 113432531 is 135234311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135234311 = 541 ⋅249971.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113432531 is a prime.

It is a super-2 number, since 2×113432531² = 25733878178131922, 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 = 113432497 and 113432506.

It is not an unprimeable number, because it can be changed into a prime (113432537) 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, 683246 + ... + 683411.

It is an arithmetic number, because the mean of its divisors is an integer number (28699818).

Almost surely, 2^113432531 is an apocalyptic number.

113432531 is a deficient number, since it is larger than the sum of its proper divisors (1366741).

113432531 is an equidigital number, since it uses as much as digits as its factorization.

113432531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366740.

The product of its digits is 1080, while the sum is 23.

The square root of 113432531 is about 10650.4709285552. The cubic root of 113432531 is about 484.0748737273.

Adding to 113432531 its reverse (135234311), we get a palindrome (248666842).

The spelling of 113432531 in words is "one hundred thirteen million, four hundred thirty-two thousand, five hundred thirty-one".