239645731231 has 2 divisors, whose sum is σ = 239645731232. Its totient is φ = 239645731230.

The previous prime is 239645731207. The next prime is 239645731243. The reversal of 239645731231 is 132137546932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239645731231 - 2⁷ = 239645731103 is a prime.

It is a super-2 number, since 2×239645731231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239645731201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119822865615 + 119822865616.

It is an arithmetic number, because the mean of its divisors is an integer number (119822865616).

Almost surely, 2^239645731231 is an apocalyptic number.

239645731231 is a deficient number, since it is larger than the sum of its proper divisors (1).

239645731231 is an equidigital number, since it uses as much as digits as its factorization.

239645731231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 46.

The spelling of 239645731231 in words is "two hundred thirty-nine billion, six hundred forty-five million, seven hundred thirty-one thousand, two hundred thirty-one".