1131224144 has 10 divisors (see below), whose sum is σ = 2191746810. Its totient is φ = 565612064.

The previous prime is 1131224137. The next prime is 1131224167. The reversal of 1131224144 is 4414221311.

It can be written as a sum of positive squares in only one way, i.e., 621006400 + 510217744 = 24920^2 + 22588^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35350739 + ... + 35350770.

It is an arithmetic number, because the mean of its divisors is an integer number (219174681).

Almost surely, 2^1131224144 is an apocalyptic number.

It is an amenable number.

1131224144 is a deficient number, since it is larger than the sum of its proper divisors (1060522666).

1131224144 is an equidigital number, since it uses as much as digits as its factorization.

1131224144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70701517 (or 70701511 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 1131224144 is about 33633.6757432190. The cubic root of 1131224144 is about 1041.9564208746.

Adding to 1131224144 its reverse (4414221311), we get a palindrome (5545445455).

The spelling of 1131224144 in words is "one billion, one hundred thirty-one million, two hundred twenty-four thousand, one hundred forty-four".