1311433211 has 6 divisors (see below), whose sum is σ = 1441492836. Its totient is φ = 1192211900.

The previous prime is 1311433199. The next prime is 1311433241. The reversal of 1311433211 is 1123341131.

It is a de Polignac number, because none of the positive numbers 2^k-1311433211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311433241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5419025 + ... + 5419266.

It is an arithmetic number, because the mean of its divisors is an integer number (240248806).

Almost surely, 2^1311433211 is an apocalyptic number.

1311433211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1311433211 is a deficient number, since it is larger than the sum of its proper divisors (130059625).

1311433211 is a wasteful number, since it uses less digits than its factorization.

1311433211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10838313 (or 10838302 counting only the distinct ones).

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

The square root of 1311433211 is about 36213.7157855970. The cubic root of 1311433211 is about 1094.5830681968.

Adding to 1311433211 its reverse (1123341131), we get a palindrome (2434774342).

The spelling of 1311433211 in words is "one billion, three hundred eleven million, four hundred thirty-three thousand, two hundred eleven".