16224413 has 4 divisors (see below), whose sum is σ = 16530588. Its totient is φ = 15918240.

The previous prime is 16224391. The next prime is 16224419. The reversal of 16224413 is 31442261.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10640644 + 5583769 = 3262^2 + 2363^2 .

It is a cyclic number.

It is not a de Polignac number, because 16224413 - 2¹⁴ = 16208029 is a prime.

It is a super-3 number, since 3×16224413³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16224419) 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, 153008 + ... + 153113.

It is an arithmetic number, because the mean of its divisors is an integer number (4132647).

Almost surely, 2^16224413 is an apocalyptic number.

It is an amenable number.

16224413 is a deficient number, since it is larger than the sum of its proper divisors (306175).

16224413 is an equidigital number, since it uses as much as digits as its factorization.

16224413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306174.

The product of its digits is 1152, while the sum is 23.

The square root of 16224413 is about 4027.9539471052. The cubic root of 16224413 is about 253.1568390169.

Adding to 16224413 its reverse (31442261), we get a palindrome (47666674).

The spelling of 16224413 in words is "sixteen million, two hundred twenty-four thousand, four hundred thirteen".