22200401 has 4 divisors (see below), whose sum is σ = 22564404. Its totient is φ = 21836400.

The previous prime is 22200397. The next prime is 22200421. The reversal of 22200401 is 10400222.

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 2972176 + 19228225 = 1724^2 + 4385^2 .

It is a cyclic number.

It is not a de Polignac number, because 22200401 - 2² = 22200397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22200421) 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, 181910 + ... + 182031.

It is an arithmetic number, because the mean of its divisors is an integer number (5641101).

Almost surely, 2^22200401 is an apocalyptic number.

It is an amenable number.

22200401 is a deficient number, since it is larger than the sum of its proper divisors (364003).

22200401 is an equidigital number, since it uses as much as digits as its factorization.

22200401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364002.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22200401 is about 4711.7301493188. The cubic root of 22200401 is about 281.0521679717.

Adding to 22200401 its reverse (10400222), we get a palindrome (32600623).

The spelling of 22200401 in words is "twenty-two million, two hundred thousand, four hundred one".