31032021321893 has 2 divisors, whose sum is σ = 31032021321894. Its totient is φ = 31032021321892.

The previous prime is 31032021321863. The next prime is 31032021321943. The reversal of 31032021321893 is 39812312023013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30726877771489 + 305143550404 = 5543183^2 + 552398^2 .

It is a cyclic number.

It is not a de Polignac number, because 31032021321893 - 2²² = 31032017127589 is a prime.

It is a super-2 number, since 2×31032021321893² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31032021321863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15516010660946 + 15516010660947.

It is an arithmetic number, because the mean of its divisors is an integer number (15516010660947).

Almost surely, 2^{31032021321893} is an apocalyptic number.

It is an amenable number.

31032021321893 is a deficient number, since it is larger than the sum of its proper divisors (1).

31032021321893 is an equidigital number, since it uses as much as digits as its factorization.

31032021321893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 31032021321893 in words is "thirty-one trillion, thirty-two billion, twenty-one million, three hundred twenty-one thousand, eight hundred ninety-three".