1131431303 has 4 divisors (see below), whose sum is σ = 1133985768. Its totient is φ = 1128876840.

The previous prime is 1131431299. The next prime is 1131431321. The reversal of 1131431303 is 3031341311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3031341311 = 79 ⋅38371409.

It is a cyclic number.

It is not a de Polignac number, because 1131431303 - 2² = 1131431299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131431383) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1276568 + ... + 1277453.

It is an arithmetic number, because the mean of its divisors is an integer number (283496442).

Almost surely, 2^1131431303 is an apocalyptic number.

1131431303 is a deficient number, since it is larger than the sum of its proper divisors (2554465).

1131431303 is an equidigital number, since it uses as much as digits as its factorization.

1131431303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554464.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1131431303 is about 33636.7552388752. The cubic root of 1131431303 is about 1042.0200208477.

Adding to 1131431303 its reverse (3031341311), we get a palindrome (4162772614).

The spelling of 1131431303 in words is "one billion, one hundred thirty-one million, four hundred thirty-one thousand, three hundred three".