113431431 has 8 divisors (see below), whose sum is σ = 151434864. Its totient is φ = 75524480.

The previous prime is 113431427. The next prime is 113431481. The reversal of 113431431 is 134134311.

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

It is a cyclic number.

It is not a de Polignac number, because 113431431 - 2² = 113431427 is a prime.

It is a super-2 number, since 2×113431431² = 25733379077415522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 113431398 and 113431407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113431481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21330 + ... + 26111.

It is an arithmetic number, because the mean of its divisors is an integer number (18929358).

Almost surely, 2^113431431 is an apocalyptic number.

113431431 is a deficient number, since it is larger than the sum of its proper divisors (38003433).

113431431 is an equidigital number, since it uses as much as digits as its factorization.

113431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48241.

The product of its digits is 432, while the sum is 21.

The square root of 113431431 is about 10650.4192875210. The cubic root of 113431431 is about 484.0733089672.

Adding to 113431431 its reverse (134134311), we get a palindrome (247565742).

The spelling of 113431431 in words is "one hundred thirteen million, four hundred thirty-one thousand, four hundred thirty-one".