16222405 has 4 divisors (see below), whose sum is σ = 19466892. Its totient is φ = 12977920.

The previous prime is 16222387. The next prime is 16222417. The reversal of 16222405 is 50422261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50422261 = 241 ⋅209221.

It can be written as a sum of positive squares in 2 ways, for example, as 8916196 + 7306209 = 2986^2 + 2703^2 .

It is not a de Polignac number, because 16222405 - 2⁵ = 16222373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1622236 + ... + 1622245.

It is an arithmetic number, because the mean of its divisors is an integer number (4866723).

Almost surely, 2^16222405 is an apocalyptic number.

It is an amenable number.

16222405 is a deficient number, since it is larger than the sum of its proper divisors (3244487).

16222405 is an equidigital number, since it uses as much as digits as its factorization.

16222405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244486.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 16222405 is about 4027.7046813291. The cubic root of 16222405 is about 253.1463946759.

Adding to 16222405 its reverse (50422261), we get a palindrome (66644666).

The spelling of 16222405 in words is "sixteen million, two hundred twenty-two thousand, four hundred five".