113211431 has 2 divisors, whose sum is σ = 113211432. Its totient is φ = 113211430.

The previous prime is 113211421. The next prime is 113211463. The reversal of 113211431 is 134112311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113211431 - 2¹⁰ = 113210407 is a prime.

It is a super-2 number, since 2×113211431² = 25633656218135522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113211421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56605715 + 56605716.

It is an arithmetic number, because the mean of its divisors is an integer number (56605716).

Almost surely, 2^113211431 is an apocalyptic number.

113211431 is a deficient number, since it is larger than the sum of its proper divisors (1).

113211431 is an equidigital number, since it uses as much as digits as its factorization.

113211431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 17.

The square root of 113211431 is about 10640.0860428852. The cubic root of 113211431 is about 483.7601534012.

Adding to 113211431 its reverse (134112311), we get a palindrome (247323742).

The spelling of 113211431 in words is "one hundred thirteen million, two hundred eleven thousand, four hundred thirty-one".