16391224 has 16 divisors (see below), whose sum is σ = 32351400. Its totient is φ = 7764192.

The previous prime is 16391197. The next prime is 16391227. The reversal of 16391224 is 42219361.

16391224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 16391192 and 16391201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16391227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53767 + ... + 54070.

Almost surely, 2^16391224 is an apocalyptic number.

It is an amenable number.

16391224 is a deficient number, since it is larger than the sum of its proper divisors (15960176).

16391224 is a wasteful number, since it uses less digits than its factorization.

16391224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107862 (or 107858 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 16391224 is about 4048.6076619006. The cubic root of 16391224 is about 254.0214915578.

The spelling of 16391224 in words is "sixteen million, three hundred ninety-one thousand, two hundred twenty-four".