2221790 has 16 divisors (see below), whose sum is σ = 4097520. Its totient is φ = 866880.

The previous prime is 2221789. The next prime is 2221829. The reversal of 2221790 is 971222.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2300 + ... + 3119.

It is an arithmetic number, because the mean of its divisors is an integer number (256095).

2^2221790 is an apocalyptic number.

2221790 is a deficient number, since it is larger than the sum of its proper divisors (1875730).

2221790 is a wasteful number, since it uses less digits than its factorization.

2221790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5467.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2221790 is about 1490.5670062094. The cubic root of 2221790 is about 130.4871270264.

It can be divided in two parts, 22 and 21790, that added together give a palindrome (21812).

The spelling of 2221790 in words is "two million, two hundred twenty-one thousand, seven hundred ninety".