16553323 has 4 divisors (see below), whose sum is σ = 16938328. Its totient is φ = 16168320.

The previous prime is 16553309. The next prime is 16553333. The reversal of 16553323 is 32335561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16553323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16553291 and 16553300.

It is not an unprimeable number, because it can be changed into a prime (16553333) 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, 192438 + ... + 192523.

It is an arithmetic number, because the mean of its divisors is an integer number (4234582).

Almost surely, 2^16553323 is an apocalyptic number.

16553323 is a deficient number, since it is larger than the sum of its proper divisors (385005).

16553323 is an equidigital number, since it uses as much as digits as its factorization.

16553323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385004.

The product of its digits is 8100, while the sum is 28.

The square root of 16553323 is about 4068.5775155452. The cubic root of 16553323 is about 254.8561177284.

Adding to 16553323 its reverse (32335561), we get a palindrome (48888884).

The spelling of 16553323 in words is "sixteen million, five hundred fifty-three thousand, three hundred twenty-three".