16551201 has 4 divisors (see below), whose sum is σ = 22068272. Its totient is φ = 11034132.

The previous prime is 16551163. The next prime is 16551209. The reversal of 16551201 is 10215561.

16551201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16551201 - 2¹⁸ = 16289057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16551209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758531 + ... + 2758536.

It is an arithmetic number, because the mean of its divisors is an integer number (5517068).

Almost surely, 2^16551201 is an apocalyptic number.

It is an amenable number.

16551201 is a deficient number, since it is larger than the sum of its proper divisors (5517071).

16551201 is an equidigital number, since it uses as much as digits as its factorization.

16551201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517070.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 16551201 is about 4068.3167280830. The cubic root of 16551201 is about 254.8452271096.

Adding to 16551201 its reverse (10215561), we get a palindrome (26766762).

The spelling of 16551201 in words is "sixteen million, five hundred fifty-one thousand, two hundred one".