16551422 has 4 divisors (see below), whose sum is σ = 24827136. Its totient is φ = 8275710.

The previous prime is 16551391. The next prime is 16551439. The reversal of 16551422 is 22415561.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 16551391 and 16551400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4137854 + ... + 4137857.

It is an arithmetic number, because the mean of its divisors is an integer number (6206784).

Almost surely, 2^16551422 is an apocalyptic number.

16551422 is a deficient number, since it is larger than the sum of its proper divisors (8275714).

16551422 is an equidigital number, since it uses as much as digits as its factorization.

16551422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8275713.

The product of its digits is 2400, while the sum is 26.

The square root of 16551422 is about 4068.3438891028. The cubic root of 16551422 is about 254.8463613786.

Adding to 16551422 its reverse (22415561), we get a palindrome (38966983).

The spelling of 16551422 in words is "sixteen million, five hundred fifty-one thousand, four hundred twenty-two".