31323113019973 has 2 divisors, whose sum is σ = 31323113019974. Its totient is φ = 31323113019972.

The previous prime is 31323113019971. The next prime is 31323113020103. The reversal of 31323113019973 is 37991031132313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31091129187364 + 231983832609 = 5575942^2 + 481647^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323113019973 - 2¹ = 31323113019971 is a prime.

It is a super-2 number, since 2×31323113019973² (a number of 28 digits) contains 22 as substring.

Together with 31323113019971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31323113019971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661556509986 + 15661556509987.

It is an arithmetic number, because the mean of its divisors is an integer number (15661556509987).

Almost surely, 2^{31323113019973} is an apocalyptic number.

It is an amenable number.

31323113019973 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323113019973 is an equidigital number, since it uses as much as digits as its factorization.

31323113019973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 275562, while the sum is 46.

The spelling of 31323113019973 in words is "thirty-one trillion, three hundred twenty-three billion, one hundred thirteen million, nineteen thousand, nine hundred seventy-three".