1131331303 has 4 divisors (see below), whose sum is σ = 1133599000. Its totient is φ = 1129063608.

The previous prime is 1131331259. The next prime is 1131331319. The reversal of 1131331303 is 3031331311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131331303 - 2⁹ = 1131330791 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 (1131331363) 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, 1133100 + ... + 1134097.

It is an arithmetic number, because the mean of its divisors is an integer number (283399750).

Almost surely, 2^1131331303 is an apocalyptic number.

1131331303 is a deficient number, since it is larger than the sum of its proper divisors (2267697).

1131331303 is an equidigital number, since it uses as much as digits as its factorization.

1131331303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267696.

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 1131331303 is about 33635.2687368482. The cubic root of 1131331303 is about 1041.9893207743.

Adding to 1131331303 its reverse (3031331311), we get a palindrome (4162662614).

The spelling of 1131331303 in words is "one billion, one hundred thirty-one million, three hundred thirty-one thousand, three hundred three".