1143285331 has 2 divisors, whose sum is σ = 1143285332. Its totient is φ = 1143285330.

The previous prime is 1143285329. The next prime is 1143285337. The reversal of 1143285331 is 1335823411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1143285331 - 2¹ = 1143285329 is a prime.

It is a super-2 number, since 2×1143285331² = 2614202696159559122, which contains 22 as substring.

Together with 1143285329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1143285293 and 1143285302.

It is not a weakly prime, because it can be changed into another prime (1143285337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571642665 + 571642666.

It is an arithmetic number, because the mean of its divisors is an integer number (571642666).

Almost surely, 2^1143285331 is an apocalyptic number.

1143285331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143285331 is an equidigital number, since it uses as much as digits as its factorization.

1143285331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 1143285331 is about 33812.5025841034. The cubic root of 1143285331 is about 1045.6464734555.

The spelling of 1143285331 in words is "one billion, one hundred forty-three million, two hundred eighty-five thousand, three hundred thirty-one".