1143305155 has 4 divisors (see below), whose sum is σ = 1371966192. Its totient is φ = 914644120.

The previous prime is 1143305129. The next prime is 1143305159. The reversal of 1143305155 is 5515033411.

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

It is not a de Polignac number, because 1143305155 - 2²³ = 1134916547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143305159) 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, 114330511 + ... + 114330520.

It is an arithmetic number, because the mean of its divisors is an integer number (342991548).

Almost surely, 2^1143305155 is an apocalyptic number.

1143305155 is a deficient number, since it is larger than the sum of its proper divisors (228661037).

1143305155 is an equidigital number, since it uses as much as digits as its factorization.

1143305155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228661036.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1143305155 is about 33812.7957288361. The cubic root of 1143305155 is about 1045.6525170841.

Adding to 1143305155 its reverse (5515033411), we get a palindrome (6658338566).

The spelling of 1143305155 in words is "one billion, one hundred forty-three million, three hundred five thousand, one hundred fifty-five".