113431213 has 4 divisors (see below), whose sum is σ = 129635680. Its totient is φ = 97226748.

The previous prime is 113431189. The next prime is 113431231. The reversal of 113431213 is 312134311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312134311 = 23 ⋅13571057.

It is a cyclic number.

It is not a de Polignac number, because 113431213 - 2⁹ = 113430701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113431013) 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, 8102223 + ... + 8102236.

It is an arithmetic number, because the mean of its divisors is an integer number (32408920).

Almost surely, 2^113431213 is an apocalyptic number.

It is an amenable number.

113431213 is a deficient number, since it is larger than the sum of its proper divisors (16204467).

113431213 is an equidigital number, since it uses as much as digits as its factorization.

113431213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16204466.

The product of its digits is 216, while the sum is 19.

The square root of 113431213 is about 10650.4090531773. The cubic root of 113431213 is about 484.0729988590.

Adding to 113431213 its reverse (312134311), we get a palindrome (425565524).

The spelling of 113431213 in words is "one hundred thirteen million, four hundred thirty-one thousand, two hundred thirteen".