16224401 has 4 divisors (see below), whose sum is σ = 16233252. Its totient is φ = 16215552.

The previous prime is 16224391. The next prime is 16224419. The reversal of 16224401 is 10442261.

16224401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13868176 + 2356225 = 3724^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 16224401 - 2¹⁸ = 15962257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16224451) 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, 536 + ... + 5721.

It is an arithmetic number, because the mean of its divisors is an integer number (4058313).

Almost surely, 2^16224401 is an apocalyptic number.

It is an amenable number.

16224401 is a deficient number, since it is larger than the sum of its proper divisors (8851).

16224401 is an equidigital number, since it uses as much as digits as its factorization.

16224401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8850.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 16224401 is about 4027.9524575149. The cubic root of 16224401 is about 253.1567766031.

Adding to 16224401 its reverse (10442261), we get a palindrome (26666662).

The spelling of 16224401 in words is "sixteen million, two hundred twenty-four thousand, four hundred one".