3131223239 has 2 divisors, whose sum is σ = 3131223240. Its totient is φ = 3131223238.

The previous prime is 3131223211. The next prime is 3131223241. The reversal of 3131223239 is 9323221313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131223239 is a prime.

It is a super-2 number, since 2×3131223239² = 19609117944907302242, which contains 22 as substring.

Together with 3131223241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131223839) 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, 1565611619 + 1565611620.

It is an arithmetic number, because the mean of its divisors is an integer number (1565611620).

Almost surely, 2^3131223239 is an apocalyptic number.

3131223239 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131223239 is an equidigital number, since it uses as much as digits as its factorization.

3131223239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 29.

The square root of 3131223239 is about 55957.3340948262. The cubic root of 3131223239 is about 1462.9787248544.

The spelling of 3131223239 in words is "three billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred thirty-nine".