1131031503 has 48 divisors (see below), whose sum is σ = 1923517440. Its totient is φ = 626885568.

The previous prime is 1131031477. The next prime is 1131031507. The reversal of 1131031503 is 3051301311.

1131031503 is a `hidden beast` number, since 1 + 131 + 0 + 31 + 503 = 666.

It is not a de Polignac number, because 1131031503 - 2³⁰ = 57289679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131031507) 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 47 ways as a sum of consecutive naturals, for example, 1088058 + ... + 1089096.

It is an arithmetic number, because the mean of its divisors is an integer number (40073280).

Almost surely, 2^1131031503 is an apocalyptic number.

1131031503 is a deficient number, since it is larger than the sum of its proper divisors (792485937).

1131031503 is a wasteful number, since it uses less digits than its factorization.

1131031503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556 (or 1553 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 1131031503 is about 33630.8118100054. The cubic root of 1131031503 is about 1041.8972711110.

Adding to 1131031503 its reverse (3051301311), we get a palindrome (4182332814).

The spelling of 1131031503 in words is "one billion, one hundred thirty-one million, thirty-one thousand, five hundred three".