2144224421 has 2 divisors, whose sum is σ = 2144224422. Its totient is φ = 2144224420.

The previous prime is 2144224367. The next prime is 2144224441. The reversal of 2144224421 is 1244224412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1405200196 + 739024225 = 37486^2 + 27185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144224421 is a prime.

It is a super-2 number, since 2×2144224421² = 9195396735225570482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2144224441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072112210 + 1072112211.

It is an arithmetic number, because the mean of its divisors is an integer number (1072112211).

Almost surely, 2^2144224421 is an apocalyptic number.

It is an amenable number.

2144224421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144224421 is an equidigital number, since it uses as much as digits as its factorization.

2144224421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4096, while the sum is 26.

The square root of 2144224421 is about 46305.7709254473. The cubic root of 2144224421 is about 1289.5061348911.

Adding to 2144224421 its reverse (1244224412), we get a palindrome (3388448833).

Subtracting from 2144224421 its reverse (1244224412), we obtain a palindrome (900000009).

The spelling of 2144224421 in words is "two billion, one hundred forty-four million, two hundred twenty-four thousand, four hundred twenty-one".