622217249 has 2 divisors, whose sum is σ = 622217250. Its totient is φ = 622217248.

The previous prime is 622217231. The next prime is 622217251. The reversal of 622217249 is 942712226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 563587600 + 58629649 = 23740^2 + 7657^2 .

It is a cyclic number.

It is not a de Polignac number, because 622217249 - 2⁸ = 622216993 is a prime.

Together with 622217251, 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 (622217269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311108624 + 311108625.

It is an arithmetic number, because the mean of its divisors is an integer number (311108625).

Almost surely, 2^622217249 is an apocalyptic number.

It is an amenable number.

622217249 is a deficient number, since it is larger than the sum of its proper divisors (1).

622217249 is an equidigital number, since it uses as much as digits as its factorization.

622217249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 622217249 is about 24944.2828920777. The cubic root of 622217249 is about 853.7171688172.

The spelling of 622217249 in words is "six hundred twenty-two million, two hundred seventeen thousand, two hundred forty-nine".