31985048017 has 4 divisors (see below), whose sum is σ = 34445436340. Its totient is φ = 29524659696.

The previous prime is 31985047979. The next prime is 31985048119. The reversal of 31985048017 is 71084058913.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71084058913 = 7 ⋅10154865559.

It can be written as a sum of positive squares in 2 ways, for example, as 2401392016 + 29583656001 = 49004^2 + 171999^2 .

It is a cyclic number.

It is not a de Polignac number, because 31985048017 - 2¹⁹ = 31984523729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31985045017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1230194142 + ... + 1230194167.

It is an arithmetic number, because the mean of its divisors is an integer number (8611359085).

Almost surely, 2^31985048017 is an apocalyptic number.

It is an amenable number.

31985048017 is a deficient number, since it is larger than the sum of its proper divisors (2460388323).

31985048017 is a wasteful number, since it uses less digits than its factorization.

31985048017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460388322.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 31985048017 in words is "thirty-one billion, nine hundred eighty-five million, forty-eight thousand, seventeen".