16222401 has 24 divisors (see below), whose sum is σ = 25659816. Its totient is φ = 9815040.

The previous prime is 16222387. The next prime is 16222417. The reversal of 16222401 is 10422261.

16222401 is a `hidden beast` number, since 1 + 622 + 2 + 40 + 1 = 666.

16222401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 230400 + 15992001 = 480^2 + 3999^2 .

It is not a de Polignac number, because 16222401 - 2⁹ = 16221889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16222421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6001 + ... + 8273.

It is an arithmetic number, because the mean of its divisors is an integer number (1069159).

Almost surely, 2^16222401 is an apocalyptic number.

It is an amenable number.

16222401 is a deficient number, since it is larger than the sum of its proper divisors (9437415).

16222401 is a wasteful number, since it uses less digits than its factorization.

16222401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353 (or 2350 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 16222401 is about 4027.7041847683. The cubic root of 16222401 is about 253.1463738696.

Adding to 16222401 its reverse (10422261), we get a palindrome (26644662).

The spelling of 16222401 in words is "sixteen million, two hundred twenty-two thousand, four hundred one".