213311311 has 2 divisors, whose sum is σ = 213311312. Its totient is φ = 213311310.

The previous prime is 213311221. The next prime is 213311321. The reversal of 213311311 is 113113312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213311311 - 2¹³ = 213303119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213311321) 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, 106655655 + 106655656.

It is an arithmetic number, because the mean of its divisors is an integer number (106655656).

Almost surely, 2^213311311 is an apocalyptic number.

213311311 is a deficient number, since it is larger than the sum of its proper divisors (1).

213311311 is an equidigital number, since it uses as much as digits as its factorization.

213311311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54, while the sum is 16.

The square root of 213311311 is about 14605.1809643017. The cubic root of 213311311 is about 597.5000715440.

Adding to 213311311 its reverse (113113312), we get a palindrome (326424623).

The spelling of 213311311 in words is "two hundred thirteen million, three hundred eleven thousand, three hundred eleven".