1131303331 has 2 divisors, whose sum is σ = 1131303332. Its totient is φ = 1131303330.

The previous prime is 1131303319. The next prime is 1131303343. The reversal of 1131303331 is 1333031311.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1131303319) and next prime (1131303343).

It is a cyclic number.

It is not a de Polignac number, because 1131303331 - 2⁷ = 1131303203 is a prime.

It is a super-2 number, since 2×1131303331² = 2559694453463391122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131303299 and 1131303308.

It is not a weakly prime, because it can be changed into another prime (1131303431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565651665 + 565651666.

It is an arithmetic number, because the mean of its divisors is an integer number (565651666).

Almost surely, 2^1131303331 is an apocalyptic number.

1131303331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131303331 is an equidigital number, since it uses as much as digits as its factorization.

1131303331 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1131303331 is about 33634.8529207428. The cubic root of 1131303331 is about 1041.9807330260.

Adding to 1131303331 its reverse (1333031311), we get a palindrome (2464334642).

The spelling of 1131303331 in words is "one billion, one hundred thirty-one million, three hundred three thousand, three hundred thirty-one".