213322247 has 2 divisors, whose sum is σ = 213322248. Its totient is φ = 213322246.

The previous prime is 213322223. The next prime is 213322261. The reversal of 213322247 is 742223312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213322247 - 2¹⁰ = 213321223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213322147) 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, 106661123 + 106661124.

It is an arithmetic number, because the mean of its divisors is an integer number (106661124).

Almost surely, 2^213322247 is an apocalyptic number.

213322247 is a deficient number, since it is larger than the sum of its proper divisors (1).

213322247 is an equidigital number, since it uses as much as digits as its factorization.

213322247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 26.

The square root of 213322247 is about 14605.5553471958. Note that the first 3 decimals coincide. The cubic root of 213322247 is about 597.5102822061.

Adding to 213322247 its reverse (742223312), we get a palindrome (955545559).

The spelling of 213322247 in words is "two hundred thirteen million, three hundred twenty-two thousand, two hundred forty-seven".