210310031993 has 2 divisors, whose sum is σ = 210310031994. Its totient is φ = 210310031992.

The previous prime is 210310031989. The next prime is 210310032029. The reversal of 210310031993 is 399130013012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143677386304 + 66632645689 = 379048^2 + 258133^2 .

It is a cyclic number.

It is not a de Polignac number, because 210310031993 - 2² = 210310031989 is a prime.

It is not a weakly prime, because it can be changed into another prime (210310031693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105155015996 + 105155015997.

It is an arithmetic number, because the mean of its divisors is an integer number (105155015997).

Almost surely, 2^210310031993 is an apocalyptic number.

It is an amenable number.

210310031993 is a deficient number, since it is larger than the sum of its proper divisors (1).

210310031993 is an equidigital number, since it uses as much as digits as its factorization.

210310031993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The spelling of 210310031993 in words is "two hundred ten billion, three hundred ten million, thirty-one thousand, nine hundred ninety-three".