222002001 has 24 divisors (see below), whose sum is σ = 351862056. Its totient is φ = 134035200.

The previous prime is 222001987. The next prime is 222002051. The reversal of 222002001 is 100200222.

It can be written as a sum of positive squares in 4 ways, for example, as 4410000 + 217592001 = 2100^2 + 14751^2 .

It is not a de Polignac number, because 222002001 - 2⁶ = 222001937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (222002051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11700 + ... + 24101.

It is an arithmetic number, because the mean of its divisors is an integer number (14660919).

Almost surely, 2^222002001 is an apocalyptic number.

It is an amenable number.

222002001 is a deficient number, since it is larger than the sum of its proper divisors (129860055).

222002001 is a wasteful number, since it uses less digits than its factorization.

222002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35873 (or 35870 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 222002001 is about 14899.7315747634. The cubic root of 222002001 is about 605.5067138878.

Adding to 222002001 its reverse (100200222), we get a palindrome (322202223).

The spelling of 222002001 in words is "two hundred twenty-two million, two thousand, one".