31133420239 has 2 divisors, whose sum is σ = 31133420240. Its totient is φ = 31133420238.

The previous prime is 31133420231. The next prime is 31133420303. The reversal of 31133420239 is 93202433113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31133420239 - 2³ = 31133420231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31133420239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31133420231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566710119 + 15566710120.

It is an arithmetic number, because the mean of its divisors is an integer number (15566710120).

Almost surely, 2^31133420239 is an apocalyptic number.

31133420239 is a deficient number, since it is larger than the sum of its proper divisors (1).

31133420239 is an equidigital number, since it uses as much as digits as its factorization.

31133420239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

The spelling of 31133420239 in words is "thirty-one billion, one hundred thirty-three million, four hundred twenty thousand, two hundred thirty-nine".