31321033329973 has 2 divisors, whose sum is σ = 31321033329974. Its totient is φ = 31321033329972.

The previous prime is 31321033329959. The next prime is 31321033330019. The reversal of 31321033329973 is 37992333012313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22298020638084 + 9023012691889 = 4722078^2 + 3003833^2 .

It is a cyclic number.

It is not a de Polignac number, because 31321033329973 - 2⁹ = 31321033329461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321033329473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660516664986 + 15660516664987.

It is an arithmetic number, because the mean of its divisors is an integer number (15660516664987).

Almost surely, 2^{31321033329973} is an apocalyptic number.

It is an amenable number.

31321033329973 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321033329973 is an equidigital number, since it uses as much as digits as its factorization.

31321033329973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1653372, while the sum is 49.

The spelling of 31321033329973 in words is "thirty-one trillion, three hundred twenty-one billion, thirty-three million, three hundred twenty-nine thousand, nine hundred seventy-three".