622216549 has 2 divisors, whose sum is σ = 622216550. Its totient is φ = 622216548.

The previous prime is 622216453. The next prime is 622216583. The reversal of 622216549 is 945612226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551404324 + 70812225 = 23482^2 + 8415^2 .

It is a cyclic number.

It is not a de Polignac number, because 622216549 - 2⁷ = 622216421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622216589) 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, 311108274 + 311108275.

It is an arithmetic number, because the mean of its divisors is an integer number (311108275).

Almost surely, 2^622216549 is an apocalyptic number.

It is an amenable number.

622216549 is a deficient number, since it is larger than the sum of its proper divisors (1).

622216549 is an equidigital number, since it uses as much as digits as its factorization.

622216549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 622216549 is about 24944.2688608025. The cubic root of 622216549 is about 853.7168486706.

The spelling of 622216549 in words is "six hundred twenty-two million, two hundred sixteen thousand, five hundred forty-nine".