31631108717 has 4 divisors (see below), whose sum is σ = 34064270940. Its totient is φ = 29197946496.

The previous prime is 31631108713. The next prime is 31631108741. The reversal of 31631108717 is 71780113613.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19974451561 + 11656657156 = 141331^2 + 107966^2 .

It is a cyclic number.

It is not a de Polignac number, because 31631108717 - 2² = 31631108713 is a prime.

It is a super-3 number, since 3×31631108717³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31631108713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1216581092 + ... + 1216581117.

It is an arithmetic number, because the mean of its divisors is an integer number (8516067735).

Almost surely, 2^31631108717 is an apocalyptic number.

It is an amenable number.

31631108717 is a deficient number, since it is larger than the sum of its proper divisors (2433162223).

31631108717 is a wasteful number, since it uses less digits than its factorization.

31631108717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433162222.

The product of its (nonzero) digits is 21168, while the sum is 38.

The spelling of 31631108717 in words is "thirty-one billion, six hundred thirty-one million, one hundred eight thousand, seven hundred seventeen".