16622201 has 2 divisors, whose sum is σ = 16622202. Its totient is φ = 16622200.

The previous prime is 16622159. The next prime is 16622219. The reversal of 16622201 is 10222661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16410601 + 211600 = 4051^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 16622201 - 2¹⁴ = 16605817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16622101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8311100 + 8311101.

It is an arithmetic number, because the mean of its divisors is an integer number (8311101).

Almost surely, 2^16622201 is an apocalyptic number.

It is an amenable number.

16622201 is a deficient number, since it is larger than the sum of its proper divisors (1).

16622201 is an equidigital number, since it uses as much as digits as its factorization.

16622201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 16622201 is about 4077.0333577247. The cubic root of 16622201 is about 255.2091120802.

Adding to 16622201 its reverse (10222661), we get a palindrome (26844862).

The spelling of 16622201 in words is "sixteen million, six hundred twenty-two thousand, two hundred one".