1311131304 has 48 divisors (see below), whose sum is σ = 4058265120. Its totient is φ = 374608800.

The previous prime is 1311131303. The next prime is 1311131387. The reversal of 1311131304 is 4031311131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1311131303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1300222 + ... + 1301229.

It is an arithmetic number, because the mean of its divisors is an integer number (84547190).

Almost surely, 2^1311131304 is an apocalyptic number.

1311131304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1311131304 is an abundant number, since it is smaller than the sum of its proper divisors (2747133816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311131304 is a wasteful number, since it uses less digits than its factorization.

1311131304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601470 (or 2601463 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1311131304 is about 36209.5471388417. The cubic root of 1311131304 is about 1094.4990665489.

Adding to 1311131304 its reverse (4031311131), we get a palindrome (5342442435).

The spelling of 1311131304 in words is "one billion, three hundred eleven million, one hundred thirty-one thousand, three hundred four".