16226401 has 2 divisors, whose sum is σ = 16226402. Its totient is φ = 16226400.

The previous prime is 16226393. The next prime is 16226429. The reversal of 16226401 is 10462261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10394176 + 5832225 = 3224^2 + 2415^2 .

It is an emirp because it is prime and its reverse (10462261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16226401 - 2³ = 16226393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16226471) 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 as a sum of consecutive naturals, namely, 8113200 + 8113201.

It is an arithmetic number, because the mean of its divisors is an integer number (8113201).

Almost surely, 2^16226401 is an apocalyptic number.

It is an amenable number.

16226401 is a deficient number, since it is larger than the sum of its proper divisors (1).

16226401 is an equidigital number, since it uses as much as digits as its factorization.

16226401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16226401 is about 4028.2007149595. The cubic root of 16226401 is about 253.1671784817.

Adding to 16226401 its reverse (10462261), we get a palindrome (26688662).

The spelling of 16226401 in words is "sixteen million, two hundred twenty-six thousand, four hundred one".