113431231 has 2 divisors, whose sum is σ = 113431232. Its totient is φ = 113431230.

The previous prime is 113431189. The next prime is 113431303. The reversal of 113431231 is 132134311.

It is a weak prime.

It is an emirp because it is prime and its reverse (132134311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113431231 - 2¹³ = 113423039 is a prime.

It is a super-2 number, since 2×113431231² = 25733288332350722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 113431199 and 113431208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113411231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56715615 + 56715616.

It is an arithmetic number, because the mean of its divisors is an integer number (56715616).

Almost surely, 2^113431231 is an apocalyptic number.

113431231 is a deficient number, since it is larger than the sum of its proper divisors (1).

113431231 is an equidigital number, since it uses as much as digits as its factorization.

113431231 is an evil number, because the sum of its binary digits is even.

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

The square root of 113431231 is about 10650.4098982152. The cubic root of 113431231 is about 484.0730244643.

Adding to 113431231 its reverse (132134311), we get a palindrome (245565542).

The spelling of 113431231 in words is "one hundred thirteen million, four hundred thirty-one thousand, two hundred thirty-one".