2144224321 has 4 divisors (see below), whose sum is σ = 2144992644. Its totient is φ = 2143456000.

The previous prime is 2144224319. The next prime is 2144224343. The reversal of 2144224321 is 1234224412.

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 1514766400 + 629457921 = 38920^2 + 25089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144224321 - 2¹ = 2144224319 is a prime.

It is a super-2 number, since 2×2144224321² = 9195395877535822082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2144224421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379960 + ... + 385561.

It is an arithmetic number, because the mean of its divisors is an integer number (536248161).

Almost surely, 2^2144224321 is an apocalyptic number.

It is an amenable number.

2144224321 is a deficient number, since it is larger than the sum of its proper divisors (768323).

2144224321 is an equidigital number, since it uses as much as digits as its factorization.

2144224321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768322.

The product of its digits is 3072, while the sum is 25.

The square root of 2144224321 is about 46305.7698456683. The cubic root of 2144224321 is about 1289.5061148449.

Adding to 2144224321 its reverse (1234224412), we get a palindrome (3378448733).

Subtracting from 2144224321 its reverse (1234224412), we obtain a palindrome (909999909).

The spelling of 2144224321 in words is "two billion, one hundred forty-four million, two hundred twenty-four thousand, three hundred twenty-one".