16551107 has 4 divisors (see below), whose sum is σ = 16672056. Its totient is φ = 16430160.

The previous prime is 16551091. The next prime is 16551131. The reversal of 16551107 is 70115561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70115561 = 4219 ⋅16619.

It is a cyclic number.

It is not a de Polignac number, because 16551107 - 2⁴ = 16551091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16556107) 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 in 3 ways as a sum of consecutive naturals, for example, 60269 + ... + 60542.

It is an arithmetic number, because the mean of its divisors is an integer number (4168014).

Almost surely, 2^16551107 is an apocalyptic number.

16551107 is a deficient number, since it is larger than the sum of its proper divisors (120949).

16551107 is a wasteful number, since it uses less digits than its factorization.

16551107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120948.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 16551107 is about 4068.3051753771. The cubic root of 16551107 is about 254.8447446572.

Adding to 16551107 its reverse (70115561), we get a palindrome (86666668).

The spelling of 16551107 in words is "sixteen million, five hundred fifty-one thousand, one hundred seven".