31593899213 has 2 divisors, whose sum is σ = 31593899214. Its totient is φ = 31593899212.

The previous prime is 31593899167. The next prime is 31593899263. The reversal of 31593899213 is 31299839513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31040097124 + 553802089 = 176182^2 + 23533^2 .

It is a cyclic number.

It is not a de Polignac number, because 31593899213 - 2²⁴ = 31577121997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31593899263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15796949606 + 15796949607.

It is an arithmetic number, because the mean of its divisors is an integer number (15796949607).

Almost surely, 2^31593899213 is an apocalyptic number.

It is an amenable number.

31593899213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31593899213 is an equidigital number, since it uses as much as digits as its factorization.

31593899213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The spelling of 31593899213 in words is "thirty-one billion, five hundred ninety-three million, eight hundred ninety-nine thousand, two hundred thirteen".