16553289 has 4 divisors (see below), whose sum is σ = 22071056. Its totient is φ = 11035524.

The previous prime is 16553281. The next prime is 16553293. The reversal of 16553289 is 98235561.

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 16553289 - 2³ = 16553281 is a prime.

It is a super-2 number, since 2×16553289² = 548022753435042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16553281) 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, 2758879 + ... + 2758884.

It is an arithmetic number, because the mean of its divisors is an integer number (5517764).

Almost surely, 2^16553289 is an apocalyptic number.

It is an amenable number.

16553289 is a deficient number, since it is larger than the sum of its proper divisors (5517767).

16553289 is an equidigital number, since it uses as much as digits as its factorization.

16553289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517766.

The product of its digits is 64800, while the sum is 39.

The square root of 16553289 is about 4068.5733371785. The cubic root of 16553289 is about 254.8559432395.

The spelling of 16553289 in words is "sixteen million, five hundred fifty-three thousand, two hundred eighty-nine".