213242420813 has 2 divisors, whose sum is σ = 213242420814. Its totient is φ = 213242420812.

The previous prime is 213242420759. The next prime is 213242420879. The reversal of 213242420813 is 318024242312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183803410729 + 29439010084 = 428723^2 + 171578^2 .

It is a cyclic number.

It is not a de Polignac number, because 213242420813 - 2²⁴ = 213225643597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213242420813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213242120813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106621210406 + 106621210407.

It is an arithmetic number, because the mean of its divisors is an integer number (106621210407).

Almost surely, 2^213242420813 is an apocalyptic number.

It is an amenable number.

213242420813 is a deficient number, since it is larger than the sum of its proper divisors (1).

213242420813 is an equidigital number, since it uses as much as digits as its factorization.

213242420813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 213242420813 in words is "two hundred thirteen billion, two hundred forty-two million, four hundred twenty thousand, eight hundred thirteen".