1231444441 has 2 divisors, whose sum is σ = 1231444442. Its totient is φ = 1231444440.

The previous prime is 1231444433. The next prime is 1231444477. The reversal of 1231444441 is 1444441321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1216265625 + 15178816 = 34875^2 + 3896^2 .

It is an emirp because it is prime and its reverse (1444441321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231444441 - 2³ = 1231444433 is a prime.

It is a super-2 number, since 2×1231444441² = 3032910822539604962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1231444421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615722220 + 615722221.

It is an arithmetic number, because the mean of its divisors is an integer number (615722221).

Almost surely, 2^1231444441 is an apocalyptic number.

It is an amenable number.

1231444441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231444441 is an equidigital number, since it uses as much as digits as its factorization.

1231444441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 28.

The square root of 1231444441 is about 35091.9426791963. The cubic root of 1231444441 is about 1071.8605185463.

Adding to 1231444441 its reverse (1444441321), we get a palindrome (2675885762).

The spelling of 1231444441 in words is "one billion, two hundred thirty-one million, four hundred forty-four thousand, four hundred forty-one".