16556201 has 8 divisors (see below), whose sum is σ = 17990400. Its totient is φ = 15178320.

The previous prime is 16556179. The next prime is 16556207. The reversal of 16556201 is 10265561.

16556201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16556201 - 2¹⁰ = 16555177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16556207) 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, 13466 + ... + 14643.

It is an arithmetic number, because the mean of its divisors is an integer number (2248800).

Almost surely, 2^16556201 is an apocalyptic number.

It is an amenable number.

16556201 is a deficient number, since it is larger than the sum of its proper divisors (1434199).

16556201 is a wasteful number, since it uses less digits than its factorization.

16556201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28159.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 16556201 is about 4068.9311864420. The cubic root of 16556201 is about 254.8708868355.

The spelling of 16556201 in words is "sixteen million, five hundred fifty-six thousand, two hundred one".