211993601 has 2 divisors, whose sum is σ = 211993602. Its totient is φ = 211993600.

The previous prime is 211993589. The next prime is 211993603. The reversal of 211993601 is 106399112.

It is a Cunningham number, because it is equal to 14560²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211993600 + 1 = 14560^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 211993601 - 2¹⁰ = 211992577 is a prime.

Together with 211993603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211993603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105996800 + 105996801.

It is an arithmetic number, because the mean of its divisors is an integer number (105996801).

Almost surely, 2^211993601 is an apocalyptic number.

It is an amenable number.

211993601 is a deficient number, since it is larger than the sum of its proper divisors (1).

211993601 is an equidigital number, since it uses as much as digits as its factorization.

211993601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 211993601 is about 14560.0000343407. Note that the first 4 decimals coincide. The cubic root of 211993601 is about 596.2671964181.

The spelling of 211993601 in words is "two hundred eleven million, nine hundred ninety-three thousand, six hundred one".