213244313 has 2 divisors, whose sum is σ = 213244314. Its totient is φ = 213244312.

The previous prime is 213244237. The next prime is 213244327. The reversal of 213244313 is 313442312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211062784 + 2181529 = 14528^2 + 1477^2 .

It is a cyclic number.

It is not a de Polignac number, because 213244313 - 2²⁶ = 146135449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (213244363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106622156 + 106622157.

It is an arithmetic number, because the mean of its divisors is an integer number (106622157).

Almost surely, 2^213244313 is an apocalyptic number.

It is an amenable number.

213244313 is a deficient number, since it is larger than the sum of its proper divisors (1).

213244313 is an equidigital number, since it uses as much as digits as its factorization.

213244313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 213244313 is about 14602.8871460407. The cubic root of 213244313 is about 597.4375096145.

Adding to 213244313 its reverse (313442312), we get a palindrome (526686625).

The spelling of 213244313 in words is "two hundred thirteen million, two hundred forty-four thousand, three hundred thirteen".