16553291 has 8 divisors (see below), whose sum is σ = 17663184. Its totient is φ = 15458560.

The previous prime is 16553281. The next prime is 16553293. The reversal of 16553291 is 19235561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16553291 - 2¹⁰ = 16552267 is a prime.

It is a super-2 number, since 2×16553291² = 548022885861362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16553293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490 + ... + 5943.

It is an arithmetic number, because the mean of its divisors is an integer number (2207898).

Almost surely, 2^16553291 is an apocalyptic number.

16553291 is a deficient number, since it is larger than the sum of its proper divisors (1109893).

16553291 is a wasteful number, since it uses less digits than its factorization.

16553291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581.

The product of its digits is 8100, while the sum is 32.

The square root of 16553291 is about 4068.5735829649. The cubic root of 16553291 is about 254.8559535035.

The spelling of 16553291 in words is "sixteen million, five hundred fifty-three thousand, two hundred ninety-one".