31232131039 has 2 divisors, whose sum is σ = 31232131040. Its totient is φ = 31232131038.

The previous prime is 31232131033. The next prime is 31232131067. The reversal of 31232131039 is 93013123213.

It is an a-pointer prime, because the next prime (31232131067) can be obtained adding 31232131039 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31232131039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31232130998 and 31232131016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31232131033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616065519 + 15616065520.

It is an arithmetic number, because the mean of its divisors is an integer number (15616065520).

Almost surely, 2^31232131039 is an apocalyptic number.

31232131039 is a deficient number, since it is larger than the sum of its proper divisors (1).

31232131039 is an equidigital number, since it uses as much as digits as its factorization.

31232131039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 31232131039 in words is "thirty-one billion, two hundred thirty-two million, one hundred thirty-one thousand, thirty-nine".