622216221 has 32 divisors (see below), whose sum is σ = 954187776. Its totient is φ = 357144000.

The previous prime is 622216213. The next prime is 622216229. The reversal of 622216221 is 122612226.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (622216213) and next prime (622216229).

It is not a de Polignac number, because 622216221 - 2³ = 622216213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 622216191 and 622216200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622216229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41611 + ... + 54551.

It is an arithmetic number, because the mean of its divisors is an integer number (29818368).

Almost surely, 2^622216221 is an apocalyptic number.

It is an amenable number.

622216221 is a deficient number, since it is larger than the sum of its proper divisors (331971555).

622216221 is a wasteful number, since it uses less digits than its factorization.

622216221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13033.

The product of its digits is 1152, while the sum is 24.

The square root of 622216221 is about 24944.2622861451. The cubic root of 622216221 is about 853.7166986590.

Adding to 622216221 its reverse (122612226), we get a palindrome (744828447).

The spelling of 622216221 in words is "six hundred twenty-two million, two hundred sixteen thousand, two hundred twenty-one".