213142375909 has 2 divisors, whose sum is σ = 213142375910. Its totient is φ = 213142375908.

The previous prime is 213142375879. The next prime is 213142375967. The reversal of 213142375909 is 909573241312.

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., 107616802500 + 105525573409 = 328050^2 + 324847^2 .

It is a cyclic number.

It is not a de Polignac number, because 213142375909 - 2¹¹ = 213142373861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213142375969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106571187954 + 106571187955.

It is an arithmetic number, because the mean of its divisors is an integer number (106571187955).

Almost surely, 2^213142375909 is an apocalyptic number.

It is an amenable number.

213142375909 is a deficient number, since it is larger than the sum of its proper divisors (1).

213142375909 is an equidigital number, since it uses as much as digits as its factorization.

213142375909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 213142375909 in words is "two hundred thirteen billion, one hundred forty-two million, three hundred seventy-five thousand, nine hundred nine".