222000001 has 4 divisors (see below), whose sum is σ = 223283412. Its totient is φ = 220716592.

The previous prime is 221999993. The next prime is 222000019. The reversal of 222000001 is 100000222.

It is a happy number.

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 117939600 + 104060401 = 10860^2 + 10201^2 .

It is a cyclic number.

It is not a de Polignac number, because 222000001 - 2³ = 221999993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222000061) 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, 641446 + ... + 641791.

It is an arithmetic number, because the mean of its divisors is an integer number (55820853).

Almost surely, 2^222000001 is an apocalyptic number.

It is an amenable number.

222000001 is a deficient number, since it is larger than the sum of its proper divisors (1283411).

222000001 is a wasteful number, since it uses less digits than its factorization.

222000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283410.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 222000001 is about 14899.6644593091. The cubic root of 222000001 is about 605.5048955603.

Adding to 222000001 its reverse (100000222), we get a palindrome (322000223).

The spelling of 222000001 in words is "two hundred twenty-two million, one", and thus it is an aban number.