31991999483 has 2 divisors, whose sum is σ = 31991999484. Its totient is φ = 31991999482.

The previous prime is 31991999471. The next prime is 31991999489. The reversal of 31991999483 is 38499919913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31991999483 - 2⁴ = 31991999467 is a prime.

It is not a weakly prime, because it can be changed into another prime (31991999489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15995999741 + 15995999742.

It is an arithmetic number, because the mean of its divisors is an integer number (15995999742).

Almost surely, 2^31991999483 is an apocalyptic number.

31991999483 is a deficient number, since it is larger than the sum of its proper divisors (1).

31991999483 is an equidigital number, since it uses as much as digits as its factorization.

31991999483 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17006112, while the sum is 65.

The spelling of 31991999483 in words is "thirty-one billion, nine hundred ninety-one million, nine hundred ninety-nine thousand, four hundred eighty-three".