31204199993 has 2 divisors, whose sum is σ = 31204199994. Its totient is φ = 31204199992.

The previous prime is 31204199969. The next prime is 31204200017. The reversal of 31204199993 is 39999140213.

It is a balanced prime because it is at equal distance from previous prime (31204199969) and next prime (31204200017).

It can be written as a sum of positive squares in only one way, i.e., 30007593529 + 1196606464 = 173227^2 + 34592^2 .

It is a cyclic number.

It is not a de Polignac number, because 31204199993 - 2²⁰ = 31203151417 is a prime.

It is not a weakly prime, because it can be changed into another prime (31204199953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15602099996 + 15602099997.

It is an arithmetic number, because the mean of its divisors is an integer number (15602099997).

Almost surely, 2^31204199993 is an apocalyptic number.

It is an amenable number.

31204199993 is a deficient number, since it is larger than the sum of its proper divisors (1).

31204199993 is an equidigital number, since it uses as much as digits as its factorization.

31204199993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472392, while the sum is 50.

The spelling of 31204199993 in words is "thirty-one billion, two hundred four million, one hundred ninety-nine thousand, nine hundred ninety-three".