213185330694409 has 2 divisors, whose sum is σ = 213185330694410. Its totient is φ = 213185330694408.

The previous prime is 213185330694341. The next prime is 213185330694463. The reversal of 213185330694409 is 904496033581312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154633328577225 + 58552002117184 = 12435165^2 + 7651928^2 .

It is a cyclic number.

It is not a de Polignac number, because 213185330694409 - 2¹³ = 213185330686217 is a prime.

It is not a weakly prime, because it can be changed into another prime (213185330694499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106592665347204 + 106592665347205.

It is an arithmetic number, because the mean of its divisors is an integer number (106592665347205).

Almost surely, 2^{213185330694409} is an apocalyptic number.

It is an amenable number.

213185330694409 is a deficient number, since it is larger than the sum of its proper divisors (1).

213185330694409 is an equidigital number, since it uses as much as digits as its factorization.

213185330694409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 213185330694409 in words is "two hundred thirteen trillion, one hundred eighty-five billion, three hundred thirty million, six hundred ninety-four thousand, four hundred nine".