1131440503 has 4 divisors (see below), whose sum is σ = 1131512328. Its totient is φ = 1131368680.

The previous prime is 1131440489. The next prime is 1131440507. The reversal of 1131440503 is 3050441311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1131440503 - 2²¹ = 1129343351 is a prime.

It is a super-2 number, since 2×1131440503² = 2560315223657786018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131440507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913 + ... + 47578.

It is an arithmetic number, because the mean of its divisors is an integer number (282878082).

Almost surely, 2^1131440503 is an apocalyptic number.

1131440503 is a deficient number, since it is larger than the sum of its proper divisors (71825).

1131440503 is an equidigital number, since it uses as much as digits as its factorization.

1131440503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71824.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1131440503 is about 33636.8919937618. The cubic root of 1131440503 is about 1042.0228451636.

Adding to 1131440503 its reverse (3050441311), we get a palindrome (4181881814).

The spelling of 1131440503 in words is "one billion, one hundred thirty-one million, four hundred forty thousand, five hundred three".