1331244243 has 24 divisors (see below), whose sum is σ = 2200449888. Its totient is φ = 759727872.

The previous prime is 1331244227. The next prime is 1331244259. The reversal of 1331244243 is 3424421331.

It is an interprime number because it is at equal distance from previous prime (1331244227) and next prime (1331244259).

It is not a de Polignac number, because 1331244243 - 2⁴ = 1331244227 is a prime.

It is a super-2 number, since 2×1331244243² = 3544422469041286098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1331244223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36955 + ... + 63467.

It is an arithmetic number, because the mean of its divisors is an integer number (91685412).

Almost surely, 2^1331244243 is an apocalyptic number.

1331244243 is a deficient number, since it is larger than the sum of its proper divisors (869205645).

1331244243 is a wasteful number, since it uses less digits than its factorization.

1331244243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27323 (or 27320 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 1331244243 is about 36486.2199056027. The cubic root of 1331244243 is about 1100.0672804578.

Adding to 1331244243 its reverse (3424421331), we get a palindrome (4755665574).

The spelling of 1331244243 in words is "one billion, three hundred thirty-one million, two hundred forty-four thousand, two hundred forty-three".