31948973427081 has 16 divisors (see below), whose sum is σ = 43045754146304. Its totient is φ = 21075835405824.

The previous prime is 31948973427073. The next prime is 31948973427089. The reversal of 31948973427081 is 18072437984913.

It is an interprime number because it is at equal distance from previous prime (31948973427073) and next prime (31948973427089).

It is not a de Polignac number, because 31948973427081 - 2³ = 31948973427073 is a prime.

It is a super-2 number, since 2×31948973427081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31948973427089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8579170 + ... + 11726043.

It is an arithmetic number, because the mean of its divisors is an integer number (2690359634144).

Almost surely, 2^{31948973427081} is an apocalyptic number.

It is an amenable number.

31948973427081 is a deficient number, since it is larger than the sum of its proper divisors (11096780719223).

31948973427081 is a wasteful number, since it uses less digits than its factorization.

31948973427081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20310720.

The product of its (nonzero) digits is 73156608, while the sum is 66.

The spelling of 31948973427081 in words is "thirty-one trillion, nine hundred forty-eight billion, nine hundred seventy-three million, four hundred twenty-seven thousand, eighty-one".