222320401 has 2 divisors, whose sum is σ = 222320402. Its totient is φ = 222320400.

The previous prime is 222320389. The next prime is 222320419. The reversal of 222320401 is 104023222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127238400 + 95082001 = 11280^2 + 9751^2 .

It is a cyclic number.

It is not a de Polignac number, because 222320401 - 2²¹ = 220223249 is a prime.

It is not a weakly prime, because it can be changed into another prime (222320701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111160200 + 111160201.

It is an arithmetic number, because the mean of its divisors is an integer number (111160201).

Almost surely, 2^222320401 is an apocalyptic number.

It is an amenable number.

222320401 is a deficient number, since it is larger than the sum of its proper divisors (1).

222320401 is an equidigital number, since it uses as much as digits as its factorization.

222320401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 222320401 is about 14910.4125026774. The cubic root of 222320401 is about 605.7960524835.

Adding to 222320401 its reverse (104023222), we get a palindrome (326343623).

The spelling of 222320401 in words is "two hundred twenty-two million, three hundred twenty thousand, four hundred one".