1143105311 has 8 divisors (see below), whose sum is σ = 1147843200. Its totient is φ = 1138377240.

The previous prime is 1143105287. The next prime is 1143105317. The reversal of 1143105311 is 1135013411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143105311 - 2¹⁸ = 1142843167 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 (1143105317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305510 + ... + 309228.

It is an arithmetic number, because the mean of its divisors is an integer number (143480400).

Almost surely, 2^1143105311 is an apocalyptic number.

1143105311 is a deficient number, since it is larger than the sum of its proper divisors (4737889).

1143105311 is an equidigital number, since it uses as much as digits as its factorization.

1143105311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4909.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1143105311 is about 33809.8404462370. The cubic root of 1143105311 is about 1045.5915885976.

Adding to 1143105311 its reverse (1135013411), we get a palindrome (2278118722).

The spelling of 1143105311 in words is "one billion, one hundred forty-three million, one hundred five thousand, three hundred eleven".