16552003 has 4 divisors (see below), whose sum is σ = 17825248. Its totient is φ = 15278760.

The previous prime is 16551991. The next prime is 16552027. The reversal of 16552003 is 30025561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30025561 = 569 ⋅52769.

It is a cyclic number.

It is not a de Polignac number, because 16552003 - 2⁵ = 16551971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16552043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636603 + ... + 636628.

It is an arithmetic number, because the mean of its divisors is an integer number (4456312).

Almost surely, 2^16552003 is an apocalyptic number.

16552003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16552003 is a deficient number, since it is larger than the sum of its proper divisors (1273245).

16552003 is a wasteful number, since it uses less digits than its factorization.

16552003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273244.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 16552003 is about 4068.4152934527. The cubic root of 16552003 is about 254.8493432776.

Adding to 16552003 its reverse (30025561), we get a palindrome (46577564).

The spelling of 16552003 in words is "sixteen million, five hundred fifty-two thousand, three".