31707985211 has 12 divisors (see below), whose sum is σ = 37404307440. Its totient is φ = 26795477520.

The previous prime is 31707985187. The next prime is 31707985241. The reversal of 31707985211 is 11258970713.

It is not a de Polignac number, because 31707985211 - 2¹⁴ = 31707968827 is a prime.

It is a super-2 number, since 2×31707985211² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31707985241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4553576 + ... + 4560533.

It is an arithmetic number, because the mean of its divisors is an integer number (3117025620).

Almost surely, 2^31707985211 is an apocalyptic number.

31707985211 is a deficient number, since it is larger than the sum of its proper divisors (5696322229).

31707985211 is an equidigital number, since it uses as much as digits as its factorization.

31707985211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9114194 (or 9114187 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 44.

The spelling of 31707985211 in words is "thirty-one billion, seven hundred seven million, nine hundred eighty-five thousand, two hundred eleven".