1331142311 has 4 divisors (see below), whose sum is σ = 1377043800. Its totient is φ = 1285240824.

The previous prime is 1331142259. The next prime is 1331142343. The reversal of 1331142311 is 1132411331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331142311 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 (1331142361) 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, 22950701 + ... + 22950758.

It is an arithmetic number, because the mean of its divisors is an integer number (344260950).

Almost surely, 2^1331142311 is an apocalyptic number.

1331142311 is a deficient number, since it is larger than the sum of its proper divisors (45901489).

1331142311 is an equidigital number, since it uses as much as digits as its factorization.

1331142311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45901488.

The product of its digits is 216, while the sum is 20.

The square root of 1331142311 is about 36484.8230227310. The cubic root of 1331142311 is about 1100.0392027351.

Adding to 1331142311 its reverse (1132411331), we get a palindrome (2463553642).

The spelling of 1331142311 in words is "one billion, three hundred thirty-one million, one hundred forty-two thousand, three hundred eleven".