1243444231 has 2 divisors, whose sum is σ = 1243444232. Its totient is φ = 1243444230.

The previous prime is 1243444207. The next prime is 1243444253. The reversal of 1243444231 is 1324443421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243444231 - 2¹¹ = 1243442183 is a prime.

It is a super-2 number, since 2×1243444231² = 3092307111214362722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1243444231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243444031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621722115 + 621722116.

It is an arithmetic number, because the mean of its divisors is an integer number (621722116).

Almost surely, 2^1243444231 is an apocalyptic number.

1243444231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243444231 is an equidigital number, since it uses as much as digits as its factorization.

1243444231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 28.

The square root of 1243444231 is about 35262.5046047498. The cubic root of 1243444231 is about 1075.3308463551.

Adding to 1243444231 its reverse (1324443421), we get a palindrome (2567887652).

It can be divided in two parts, 12434 and 44231, that added together give a palindrome (56665).

The spelling of 1243444231 in words is "one billion, two hundred forty-three million, four hundred forty-four thousand, two hundred thirty-one".