213130244309 has 2 divisors, whose sum is σ = 213130244310. Its totient is φ = 213130244308.

The previous prime is 213130244297. The next prime is 213130244333. The reversal of 213130244309 is 903442031312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205544356900 + 7585887409 = 453370^2 + 87097^2 .

It is a cyclic number.

It is not a de Polignac number, because 213130244309 - 2²⁴ = 213113467093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213133244309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565122154 + 106565122155.

It is an arithmetic number, because the mean of its divisors is an integer number (106565122155).

Almost surely, 2^213130244309 is an apocalyptic number.

It is an amenable number.

213130244309 is a deficient number, since it is larger than the sum of its proper divisors (1).

213130244309 is an equidigital number, since it uses as much as digits as its factorization.

213130244309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 213130244309 in words is "two hundred thirteen billion, one hundred thirty million, two hundred forty-four thousand, three hundred nine".