16224013 has 4 divisors (see below), whose sum is σ = 17472028. Its totient is φ = 14976000.

The previous prime is 16223959. The next prime is 16224017. The reversal of 16224013 is 31042261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31042261 = 2467 ⋅12583.

It can be written as a sum of positive squares in 2 ways, for example, as 3988009 + 12236004 = 1997^2 + 3498^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16224013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16224017) 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, 623988 + ... + 624013.

It is an arithmetic number, because the mean of its divisors is an integer number (4368007).

Almost surely, 2^16224013 is an apocalyptic number.

16224013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16224013 is a deficient number, since it is larger than the sum of its proper divisors (1248015).

16224013 is a wasteful number, since it uses less digits than its factorization.

16224013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248014.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 16224013 is about 4027.9042937985. The cubic root of 16224013 is about 253.1547585396.

Adding to 16224013 its reverse (31042261), we get a palindrome (47266274).

The spelling of 16224013 in words is "sixteen million, two hundred twenty-four thousand, thirteen".