2220445 has 4 divisors (see below), whose sum is σ = 2664540. Its totient is φ = 1776352.

The previous prime is 2220431. The next prime is 2220457. The reversal of 2220445 is 5440222.

2220445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 443556 + 1776889 = 666^2 + 1333^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220445 - 2¹⁹ = 1696157 is a prime.

2220445 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222040 + ... + 222049.

It is an arithmetic number, because the mean of its divisors is an integer number (666135).

2^2220445 is an apocalyptic number.

It is an amenable number.

2220445 is a deficient number, since it is larger than the sum of its proper divisors (444095).

2220445 is an equidigital number, since it uses as much as digits as its factorization.

2220445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444094.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 2220445 is about 1490.1157673147. The cubic root of 2220445 is about 130.4607908121.

Adding to 2220445 its reverse (5440222), we get a palindrome (7660667).

The spelling of 2220445 in words is "two million, two hundred twenty thousand, four hundred forty-five".