211313393 has 2 divisors, whose sum is σ = 211313394. Its totient is φ = 211313392.

The previous prime is 211313371. The next prime is 211313411. The reversal of 211313393 is 393313112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194239969 + 17073424 = 13937^2 + 4132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211313393 is a prime.

It is a super-2 number, since 2×211313393² = 89306700122344898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211313293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105656696 + 105656697.

It is an arithmetic number, because the mean of its divisors is an integer number (105656697).

Almost surely, 2^211313393 is an apocalyptic number.

It is an amenable number.

211313393 is a deficient number, since it is larger than the sum of its proper divisors (1).

211313393 is an equidigital number, since it uses as much as digits as its factorization.

211313393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 26.

The square root of 211313393 is about 14536.6224756647. The cubic root of 211313393 is about 595.6287804770.

The spelling of 211313393 in words is "two hundred eleven million, three hundred thirteen thousand, three hundred ninety-three".