2215444 has 24 divisors (see below), whose sum is σ = 4834368. Its totient is φ = 863040.

The previous prime is 2215417. The next prime is 2215463. The reversal of 2215444 is 4445122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3289 + ... + 3904.

It is an arithmetic number, because the mean of its divisors is an integer number (201432).

2^2215444 is an apocalyptic number.

It is an amenable number.

2215444 is an abundant number, since it is smaller than the sum of its proper divisors (2618924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2215444 is a wasteful number, since it uses less digits than its factorization.

2215444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7215 (or 7213 counting only the distinct ones).

The product of its digits is 1280, while the sum is 22.

The square root of 2215444 is about 1488.4367638566. The cubic root of 2215444 is about 130.3627736963.

It can be divided in two parts, 221 and 5444, that added together give a palindrome (5665).

The spelling of 2215444 in words is "two million, two hundred fifteen thousand, four hundred forty-four".