16580201 has 4 divisors (see below), whose sum is σ = 18087504. Its totient is φ = 15072900.

The previous prime is 16580191. The next prime is 16580251. The reversal of 16580201 is 10208561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10208561 = 11 ⋅928051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16580201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16580251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753635 + ... + 753656.

It is an arithmetic number, because the mean of its divisors is an integer number (4521876).

Almost surely, 2^16580201 is an apocalyptic number.

16580201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16580201 is a deficient number, since it is larger than the sum of its proper divisors (1507303).

16580201 is a wasteful number, since it uses less digits than its factorization.

16580201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507302.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 16580201 is about 4071.8792958535. The cubic root of 16580201 is about 254.9939816598.

Adding to 16580201 its reverse (10208561), we get a palindrome (26788762).

The spelling of 16580201 in words is "sixteen million, five hundred eighty thousand, two hundred one".