2220999 has 32 divisors (see below), whose sum is σ = 3545856. Its totient is φ = 1221120.

The previous prime is 2220979. The next prime is 2221007. The reversal of 2220999 is 9990222.

It is not a de Polignac number, because 2220999 - 2¹⁵ = 2188231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

2220999 is a modest number, since divided by 999 gives 222 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20704 + ... + 20810.

It is an arithmetic number, because the mean of its divisors is an integer number (110808).

2^2220999 is an apocalyptic number.

2220999 is a deficient number, since it is larger than the sum of its proper divisors (1324857).

2220999 is a wasteful number, since it uses less digits than its factorization.

2220999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 2220999 is about 1490.3016473184. The cubic root of 2220999 is about 130.4716398789.

Adding to 2220999 its reverse (9990222), we get a palindrome (12211221).

The spelling of 2220999 in words is "two million, two hundred twenty thousand, nine hundred ninety-nine".