16631227 has 4 divisors (see below), whose sum is σ = 16778520. Its totient is φ = 16483936.

The previous prime is 16631203. The next prime is 16631233. The reversal of 16631227 is 72213661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16631227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16631195 and 16631204.

It is not an unprimeable number, because it can be changed into a prime (16634227) 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, 73477 + ... + 73702.

It is an arithmetic number, because the mean of its divisors is an integer number (4194630).

Almost surely, 2^16631227 is an apocalyptic number.

16631227 is a deficient number, since it is larger than the sum of its proper divisors (147293).

16631227 is a wasteful number, since it uses less digits than its factorization.

16631227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147292.

The product of its digits is 3024, while the sum is 28.

The square root of 16631227 is about 4078.1401398186. The cubic root of 16631227 is about 255.2552973122.

Adding to 16631227 its reverse (72213661), we get a palindrome (88844888).

The spelling of 16631227 in words is "sixteen million, six hundred thirty-one thousand, two hundred twenty-seven".