1311343402 has 16 divisors (see below), whose sum is σ = 2037558600. Its totient is φ = 632217600.

The previous prime is 1311343337. The next prime is 1311343403. The reversal of 1311343402 is 2043431131.

It can be written as a sum of positive squares in 4 ways, for example, as 820765201 + 490578201 = 28649^2 + 22149^2 .

It is not an unprimeable number, because it can be changed into a prime (1311343403) 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 7 ways as a sum of consecutive naturals, for example, 29902 + ... + 59302.

Almost surely, 2^1311343402 is an apocalyptic number.

1311343402 is a deficient number, since it is larger than the sum of its proper divisors (726215198).

1311343402 is a wasteful number, since it uses less digits than its factorization.

1311343402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30201.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1311343402 is about 36212.4757783833. The cubic root of 1311343402 is about 1094.5580813722.

Adding to 1311343402 its reverse (2043431131), we get a palindrome (3354774533).

The spelling of 1311343402 in words is "one billion, three hundred eleven million, three hundred forty-three thousand, four hundred two".