2144247621 has 16 divisors (see below), whose sum is σ = 3041535168. Its totient is φ = 1339027200.

The previous prime is 2144247619. The next prime is 2144247629. The reversal of 2144247621 is 1267424412.

It is not a de Polignac number, because 2144247621 - 2¹ = 2144247619 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144247629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88870 + ... + 110391.

It is an arithmetic number, because the mean of its divisors is an integer number (190095948).

Almost surely, 2^2144247621 is an apocalyptic number.

It is an amenable number.

2144247621 is a deficient number, since it is larger than the sum of its proper divisors (897287547).

2144247621 is a wasteful number, since it uses less digits than its factorization.

2144247621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199492.

The product of its digits is 21504, while the sum is 33.

The square root of 2144247621 is about 46306.0214335026. The cubic root of 2144247621 is about 1289.5107855912.

The spelling of 2144247621 in words is "two billion, one hundred forty-four million, two hundred forty-seven thousand, six hundred twenty-one".