31885890317 has 8 divisors (see below), whose sum is σ = 33116401920. Its totient is φ = 30667999680.

The previous prime is 31885890301. The next prime is 31885890329. The reversal of 31885890317 is 71309858813.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31885890317 - 2⁴ = 31885890301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31885890017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3150092 + ... + 3160197.

It is an arithmetic number, because the mean of its divisors is an integer number (4139550240).

Almost surely, 2^31885890317 is an apocalyptic number.

It is an amenable number.

31885890317 is a deficient number, since it is larger than the sum of its proper divisors (1230511603).

31885890317 is a wasteful number, since it uses less digits than its factorization.

31885890317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6310483.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 31885890317 in words is "thirty-one billion, eight hundred eighty-five million, eight hundred ninety thousand, three hundred seventeen".