2221005 has 16 divisors (see below), whose sum is σ = 3741120. Its totient is φ = 1122048.

The previous prime is 2220979. The next prime is 2221007. The reversal of 2221005 is 5001222.

It is not a de Polignac number, because 2221005 - 2⁵ = 2220973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3612 + ... + 4181.

It is an arithmetic number, because the mean of its divisors is an integer number (233820).

2^2221005 is an apocalyptic number.

It is an amenable number.

2221005 is a deficient number, since it is larger than the sum of its proper divisors (1520115).

2221005 is a wasteful number, since it uses less digits than its factorization.

2221005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7820.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 2221005 is about 1490.3036603323. The cubic root of 2221005 is about 130.4717573679.

Adding to 2221005 its reverse (5001222), we get a palindrome (7222227).

The spelling of 2221005 in words is "two million, two hundred twenty-one thousand, five".