219122213 has 2 divisors, whose sum is σ = 219122214. Its totient is φ = 219122212.

The previous prime is 219122179. The next prime is 219122237. The reversal of 219122213 is 312221912.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122257249 + 96864964 = 11057^2 + 9842^2 .

It is a cyclic number.

It is not a de Polignac number, because 219122213 - 2⁸ = 219121957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219122243) 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, 109561106 + 109561107.

It is an arithmetic number, because the mean of its divisors is an integer number (109561107).

Almost surely, 2^219122213 is an apocalyptic number.

It is an amenable number.

219122213 is a deficient number, since it is larger than the sum of its proper divisors (1).

219122213 is an equidigital number, since it uses as much as digits as its factorization.

219122213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 219122213 is about 14802.7772056462. Note that the first 3 decimals coincide. The cubic root of 219122213 is about 602.8771195494.

The spelling of 219122213 in words is "two hundred nineteen million, one hundred twenty-two thousand, two hundred thirteen".