16550101 has 4 divisors (see below), whose sum is σ = 16953804. Its totient is φ = 16146400.

The previous prime is 16550099. The next prime is 16550113. The reversal of 16550101 is 10105561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10105561 = 2797 ⋅3613.

It can be written as a sum of positive squares in 2 ways, for example, as 5058001 + 11492100 = 2249^2 + 3390^2 .

It is a cyclic number.

It is not a de Polignac number, because 16550101 - 2¹ = 16550099 is a prime.

It is a super-2 number, since 2×16550101² = 547811686220402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16550801) 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, 201790 + ... + 201871.

It is an arithmetic number, because the mean of its divisors is an integer number (4238451).

Almost surely, 2^16550101 is an apocalyptic number.

It is an amenable number.

16550101 is a deficient number, since it is larger than the sum of its proper divisors (403703).

16550101 is an equidigital number, since it uses as much as digits as its factorization.

16550101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403702.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 16550101 is about 4068.1815347892. The cubic root of 16550101 is about 254.8395812764.

Adding to 16550101 its reverse (10105561), we get a palindrome (26655662).

The spelling of 16550101 in words is "sixteen million, five hundred fifty thousand, one hundred one".