16131227 has 4 divisors (see below), whose sum is σ = 18435696. Its totient is φ = 13826760.

The previous prime is 16131217. The next prime is 16131229. The reversal of 16131227 is 72213161.

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

It is a cyclic number.

It is not a de Polignac number, because 16131227 - 2⁸ = 16130971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16131229) 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, 1152224 + ... + 1152237.

It is an arithmetic number, because the mean of its divisors is an integer number (4608924).

Almost surely, 2^16131227 is an apocalyptic number.

16131227 is a deficient number, since it is larger than the sum of its proper divisors (2304469).

16131227 is an equidigital number, since it uses as much as digits as its factorization.

16131227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304468.

The product of its digits is 504, while the sum is 23.

The square root of 16131227 is about 4016.3698783852. The cubic root of 16131227 is about 252.6712337187.

Adding to 16131227 its reverse (72213161), we get a palindrome (88344388).

The spelling of 16131227 in words is "sixteen million, one hundred thirty-one thousand, two hundred twenty-seven".