1143345331 has 2 divisors, whose sum is σ = 1143345332. Its totient is φ = 1143345330.

The previous prime is 1143345283. The next prime is 1143345347. The reversal of 1143345331 is 1335433411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143345331 is a prime.

It is a super-2 number, since 2×1143345331² = 2614477091838999122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1143345331.

It is not a weakly prime, because it can be changed into another prime (1143345031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571672665 + 571672666.

It is an arithmetic number, because the mean of its divisors is an integer number (571672666).

Almost surely, 2^1143345331 is an apocalyptic number.

1143345331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143345331 is an equidigital number, since it uses as much as digits as its factorization.

1143345331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 1143345331 is about 33813.3898182362. The cubic root of 1143345331 is about 1045.6647650955.

Adding to 1143345331 its reverse (1335433411), we get a palindrome (2478778742).

The spelling of 1143345331 in words is "one billion, one hundred forty-three million, three hundred forty-five thousand, three hundred thirty-one".