213201344309 has 2 divisors, whose sum is σ = 213201344310. Its totient is φ = 213201344308.

The previous prime is 213201344281. The next prime is 213201344327. The reversal of 213201344309 is 903443102312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196874127025 + 16327217284 = 443705^2 + 127778^2 .

It is a cyclic number.

It is not a de Polignac number, because 213201344309 - 2⁸ = 213201344053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213201344009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106600672154 + 106600672155.

It is an arithmetic number, because the mean of its divisors is an integer number (106600672155).

Almost surely, 2^213201344309 is an apocalyptic number.

It is an amenable number.

213201344309 is a deficient number, since it is larger than the sum of its proper divisors (1).

213201344309 is an equidigital number, since it uses as much as digits as its factorization.

213201344309 is an evil number, because the sum of its binary digits is even.

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

The spelling of 213201344309 in words is "two hundred thirteen billion, two hundred one million, three hundred forty-four thousand, three hundred nine".