1131243344 has 160 divisors (see below), whose sum is σ = 2828390400. Its totient is φ = 425617920.

The previous prime is 1131243331. The next prime is 1131243349. The reversal of 1131243344 is 4433421311.

1131243344 = T₅₃₁₂ + T₅₃₁₃ + ... + T₅₃₉₀.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131243349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5742254 + ... + 5742450.

It is an arithmetic number, because the mean of its divisors is an integer number (17677440).

Almost surely, 2^1131243344 is an apocalyptic number.

1131243344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131243344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414195200).

1131243344 is an abundant number, since it is smaller than the sum of its proper divisors (1697147056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131243344 is a wasteful number, since it uses less digits than its factorization.

1131243344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 355 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 1131243344 is about 33633.9611702220. The cubic root of 1131243344 is about 1041.9623158012.

Adding to 1131243344 its reverse (4433421311), we get a palindrome (5564664655).

The spelling of 1131243344 in words is "one billion, one hundred thirty-one million, two hundred forty-three thousand, three hundred forty-four".