213441310909 has 2 divisors, whose sum is σ = 213441310910. Its totient is φ = 213441310908.

The previous prime is 213441310903. The next prime is 213441310963. The reversal of 213441310909 is 909013144312.

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., 213416280900 + 25030009 = 461970^2 + 5003^2 .

It is a cyclic number.

It is not a de Polignac number, because 213441310909 - 2⁵ = 213441310877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213441310903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106720655454 + 106720655455.

It is an arithmetic number, because the mean of its divisors is an integer number (106720655455).

Almost surely, 2^213441310909 is an apocalyptic number.

It is an amenable number.

213441310909 is a deficient number, since it is larger than the sum of its proper divisors (1).

213441310909 is an equidigital number, since it uses as much as digits as its factorization.

213441310909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 213441310909 in words is "two hundred thirteen billion, four hundred forty-one million, three hundred ten thousand, nine hundred nine".