2222001 has 6 divisors (see below), whose sum is σ = 3209570. Its totient is φ = 1481328.

The previous prime is 2221997. The next prime is 2222023. The reversal of 2222001 is 1002222.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 104976 = 1455^2 + 324^2 .

It is not a de Polignac number, because 2222001 - 2² = 2221997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 246889 = 2222001 / (2 + 2 + 2 + 2 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123436 + ... + 123453.

2^2222001 is an apocalyptic number.

It is an amenable number.

2222001 is a deficient number, since it is larger than the sum of its proper divisors (987569).

2222001 is a wasteful number, since it uses less digits than its factorization.

2222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246895 (or 246892 counting only the distinct ones).

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

The square root of 2222001 is about 1490.6377829641. The cubic root of 2222001 is about 130.4912576167.

Adding to 2222001 its reverse (1002222), we get a palindrome (3224223).

The spelling of 2222001 in words is "two million, two hundred twenty-two thousand, one".