2215044400 has 30 divisors (see below), whose sum is σ = 5321645132. Its totient is φ = 886017600.

The previous prime is 2215044397. The next prime is 2215044401. The reversal of 2215044400 is 44405122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2215044401) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2768406 + ... + 2769205.

Almost surely, 2^2215044400 is an apocalyptic number.

2215044400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215044400 is an abundant number, since it is smaller than the sum of its proper divisors (3106600732).

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

2215044400 is a wasteful number, since it uses less digits than its factorization.

2215044400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537629 (or 5537618 counting only the distinct ones).

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

The square root of 2215044400 is about 47064.2582008896. The cubic root of 2215044400 is about 1303.5493537335.

Adding to 2215044400 its reverse (44405122), we get a palindrome (2259449522).

The spelling of 2215044400 in words is "two billion, two hundred fifteen million, forty-four thousand, four hundred".