622216161 has 120 divisors (see below), whose sum is σ = 1174145280. Its totient is φ = 326265408.

The previous prime is 622216139. The next prime is 622216193. The reversal of 622216161 is 161612226.

622216161 is a `hidden beast` number, since 6 + 22 + 21 + 616 + 1 = 666.

It is not a de Polignac number, because 622216161 - 2¹⁰ = 622215137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622216121) 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 in 119 ways as a sum of consecutive naturals, for example, 2790096 + ... + 2790318.

It is an arithmetic number, because the mean of its divisors is an integer number (9784544).

Almost surely, 2^622216161 is an apocalyptic number.

It is an amenable number.

622216161 is a deficient number, since it is larger than the sum of its proper divisors (551929119).

622216161 is a wasteful number, since it uses less digits than its factorization.

622216161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 289 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 622216161 is about 24944.2610834637. The cubic root of 622216161 is about 853.7166712178.

Adding to 622216161 its reverse (161612226), we get a palindrome (783828387).

The spelling of 622216161 in words is "six hundred twenty-two million, two hundred sixteen thousand, one hundred sixty-one".