31981168023119 has 6 divisors (see below), whose sum is σ = 37202583210624. Its totient is φ = 27412429734060.

The previous prime is 31981168023053. The next prime is 31981168023157. The reversal of 31981168023119 is 91132086118913.

It is a de Polignac number, because none of the positive numbers 2^k-31981168023119 is a prime.

It is a super-2 number, since 2×31981168023119² (a number of 28 digits) contains 22 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 (31981168023719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 326338449167 + ... + 326338449264.

It is an arithmetic number, because the mean of its divisors is an integer number (6200430535104).

Almost surely, 2^{31981168023119} is an apocalyptic number.

31981168023119 is a deficient number, since it is larger than the sum of its proper divisors (5221415187505).

31981168023119 is an equidigital number, since it uses as much as digits as its factorization.

31981168023119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652676898445 (or 652676898438 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 53.

The spelling of 31981168023119 in words is "thirty-one trillion, nine hundred eighty-one billion, one hundred sixty-eight million, twenty-three thousand, one hundred nineteen".