16320401 has 2 divisors, whose sum is σ = 16320402. Its totient is φ = 16320400.

The previous prime is 16320371. The next prime is 16320413. The reversal of 16320401 is 10402361.

16320401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8614225 + 7706176 = 2935^2 + 2776^2 .

It is an emirp because it is prime and its reverse (10402361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16320401 - 2¹⁴ = 16304017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16320401.

It is not a weakly prime, because it can be changed into another prime (16320431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8160200 + 8160201.

It is an arithmetic number, because the mean of its divisors is an integer number (8160201).

Almost surely, 2^16320401 is an apocalyptic number.

It is an amenable number.

16320401 is a deficient number, since it is larger than the sum of its proper divisors (1).

16320401 is an equidigital number, since it uses as much as digits as its factorization.

16320401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 16320401 is about 4039.8516061856. The cubic root of 16320401 is about 253.6551057079.

Adding to 16320401 its reverse (10402361), we get a palindrome (26722762).

The spelling of 16320401 in words is "sixteen million, three hundred twenty thousand, four hundred one".