16381227 has 8 divisors (see below), whose sum is σ = 22001616. Its totient is φ = 10840832.

The previous prime is 16381207. The next prime is 16381231. The reversal of 16381227 is 72218361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16381227 - 2⁶ = 16381163 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16381194 and 16381203.

It is not an unprimeable number, because it can be changed into a prime (16381207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19518 + ... + 20339.

It is an arithmetic number, because the mean of its divisors is an integer number (2750202).

Almost surely, 2^16381227 is an apocalyptic number.

16381227 is a deficient number, since it is larger than the sum of its proper divisors (5620389).

16381227 is a wasteful number, since it uses less digits than its factorization.

16381227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39997.

The product of its digits is 4032, while the sum is 30.

The square root of 16381227 is about 4047.3728516162. The cubic root of 16381227 is about 253.9698385249.

Adding to 16381227 its reverse (72218361), we get a palindrome (88599588).

The spelling of 16381227 in words is "sixteen million, three hundred eighty-one thousand, two hundred twenty-seven".