2221844 has 6 divisors (see below), whose sum is σ = 3888234. Its totient is φ = 1110920.

The previous prime is 2221837. The next prime is 2221847. The reversal of 2221844 is 4481222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1562500 + 659344 = 1250^2 + 812^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277727 + ... + 277734.

It is an arithmetic number, because the mean of its divisors is an integer number (648039).

2^2221844 is an apocalyptic number.

It is an amenable number.

2221844 is a deficient number, since it is larger than the sum of its proper divisors (1666390).

2221844 is a wasteful number, since it uses less digits than its factorization.

2221844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555465 (or 555463 counting only the distinct ones).

The product of its digits is 1024, while the sum is 23.

The square root of 2221844 is about 1490.5851200116. The cubic root of 2221844 is about 130.4881841692.

The spelling of 2221844 in words is "two million, two hundred twenty-one thousand, eight hundred forty-four".