1444721231 has 2 divisors, whose sum is σ = 1444721232. Its totient is φ = 1444721230.

The previous prime is 1444721219. The next prime is 1444721233. The reversal of 1444721231 is 1321274441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1444721231 - 2⁶ = 1444721167 is a prime.

It is a super-2 number, since 2×1444721231² = 4174438870604310722, which contains 22 as substring.

Together with 1444721233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1444721194 and 1444721203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444721233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722360615 + 722360616.

It is an arithmetic number, because the mean of its divisors is an integer number (722360616).

Almost surely, 2^1444721231 is an apocalyptic number.

1444721231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444721231 is an equidigital number, since it uses as much as digits as its factorization.

1444721231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 29.

The square root of 1444721231 is about 38009.4886969030. The cubic root of 1444721231 is about 1130.4760129370.

Adding to 1444721231 its reverse (1321274441), we get a palindrome (2765995672).

The spelling of 1444721231 in words is "one billion, four hundred forty-four million, seven hundred twenty-one thousand, two hundred thirty-one".