1131312303 has 24 divisors (see below), whose sum is σ = 1826160336. Its totient is φ = 668918400.

The previous prime is 1131312263. The next prime is 1131312319. The reversal of 1131312303 is 3032131311.

It is a happy number.

It is not a de Polignac number, because 1131312303 - 2⁹ = 1131311791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131312323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135300 + ... + 143417.

It is an arithmetic number, because the mean of its divisors is an integer number (76090014).

Almost surely, 2^1131312303 is an apocalyptic number.

1131312303 is a deficient number, since it is larger than the sum of its proper divisors (694848033).

1131312303 is a wasteful number, since it uses less digits than its factorization.

1131312303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278775 (or 278772 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1131312303 is about 33634.9862940362. The cubic root of 1131312303 is about 1041.9834875558.

Adding to 1131312303 its reverse (3032131311), we get a palindrome (4163443614).

The spelling of 1131312303 in words is "one billion, one hundred thirty-one million, three hundred twelve thousand, three hundred three".