31201202993 has 2 divisors, whose sum is σ = 31201202994. Its totient is φ = 31201202992.

The previous prime is 31201202969. The next prime is 31201203013. The reversal of 31201202993 is 39920210213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27779888929 + 3421314064 = 166673^2 + 58492^2 .

It is a cyclic number.

It is not a de Polignac number, because 31201202993 - 2⁸ = 31201202737 is a prime.

It is not a weakly prime, because it can be changed into another prime (31201222993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600601496 + 15600601497.

It is an arithmetic number, because the mean of its divisors is an integer number (15600601497).

Almost surely, 2^31201202993 is an apocalyptic number.

It is an amenable number.

31201202993 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201202993 is an equidigital number, since it uses as much as digits as its factorization.

31201202993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 31201202993 in words is "thirty-one billion, two hundred one million, two hundred two thousand, nine hundred ninety-three".