16550161 has 4 divisors (see below), whose sum is σ = 16642800. Its totient is φ = 16457524.

The previous prime is 16550153. The next prime is 16550189. The reversal of 16550161 is 16105561.

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 a cyclic number.

It is not a de Polignac number, because 16550161 - 2³ = 16550153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16550461) 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, 46051 + ... + 46408.

It is an arithmetic number, because the mean of its divisors is an integer number (4160700).

Almost surely, 2^16550161 is an apocalyptic number.

It is an amenable number.

16550161 is a deficient number, since it is larger than the sum of its proper divisors (92639).

16550161 is an equidigital number, since it uses as much as digits as its factorization.

16550161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92638.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 16550161 is about 4068.1889090847. The cubic root of 16550161 is about 254.8398892374.

The spelling of 16550161 in words is "sixteen million, five hundred fifty thousand, one hundred sixty-one".