31631314009 has 2 divisors, whose sum is σ = 31631314010. Its totient is φ = 31631314008.

The previous prime is 31631314003. The next prime is 31631314049. The reversal of 31631314009 is 90041313613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26332201984 + 5299112025 = 162272^2 + 72795^2 .

It is a cyclic number.

It is not a de Polignac number, because 31631314009 - 2¹¹ = 31631311961 is a prime.

It is not a weakly prime, because it can be changed into another prime (31631314003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15815657004 + 15815657005.

It is an arithmetic number, because the mean of its divisors is an integer number (15815657005).

Almost surely, 2^31631314009 is an apocalyptic number.

It is an amenable number.

31631314009 is a deficient number, since it is larger than the sum of its proper divisors (1).

31631314009 is an equidigital number, since it uses as much as digits as its factorization.

31631314009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 31631314009 in words is "thirty-one billion, six hundred thirty-one million, three hundred fourteen thousand, nine".