1131443311 has 8 divisors (see below), whose sum is σ = 1171692864. Its totient is φ = 1091893920.

The previous prime is 1131443303. The next prime is 1131443333. The reversal of 1131443311 is 1133441311.

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 1131443311 - 2³ = 1131443303 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 (1131443371) 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, 171751 + ... + 178216.

It is an arithmetic number, because the mean of its divisors is an integer number (146461608).

Almost surely, 2^1131443311 is an apocalyptic number.

1131443311 is a deficient number, since it is larger than the sum of its proper divisors (40249553).

1131443311 is an equidigital number, since it uses as much as digits as its factorization.

1131443311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350081.

The product of its digits is 432, while the sum is 22.

The square root of 1131443311 is about 33636.9337336208. The cubic root of 1131443311 is about 1042.0237071908.

Adding to 1131443311 its reverse (1133441311), we get a palindrome (2264884622).

The spelling of 1131443311 in words is "one billion, one hundred thirty-one million, four hundred forty-three thousand, three hundred eleven".