239831489231 has 2 divisors, whose sum is σ = 239831489232. Its totient is φ = 239831489230.

The previous prime is 239831489159. The next prime is 239831489239. The reversal of 239831489231 is 132984138932.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239831489231 is a prime.

It is a super-2 number, since 2×239831489231² (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 (239831489239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119915744615 + 119915744616.

It is an arithmetic number, because the mean of its divisors is an integer number (119915744616).

Almost surely, 2^239831489231 is an apocalyptic number.

239831489231 is a deficient number, since it is larger than the sum of its proper divisors (1).

239831489231 is an equidigital number, since it uses as much as digits as its factorization.

239831489231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 53.

The spelling of 239831489231 in words is "two hundred thirty-nine billion, eight hundred thirty-one million, four hundred eighty-nine thousand, two hundred thirty-one".