623220211 has 2 divisors, whose sum is σ = 623220212. Its totient is φ = 623220210.

The previous prime is 623220161. The next prime is 623220229. The reversal of 623220211 is 112022326.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623220211 - 2²⁷ = 489002483 is a prime.

It is not a weakly prime, because it can be changed into another prime (623220271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311610105 + 311610106.

It is an arithmetic number, because the mean of its divisors is an integer number (311610106).

Almost surely, 2^623220211 is an apocalyptic number.

623220211 is a deficient number, since it is larger than the sum of its proper divisors (1).

623220211 is an equidigital number, since it uses as much as digits as its factorization.

623220211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 623220211 is about 24964.3788426630. The cubic root of 623220211 is about 854.1756293879.

Adding to 623220211 its reverse (112022326), we get a palindrome (735242537).

The spelling of 623220211 in words is "six hundred twenty-three million, two hundred twenty thousand, two hundred eleven".