1311500343 has 16 divisors (see below), whose sum is σ = 1865673216. Its totient is φ = 816616320.

The previous prime is 1311500329. The next prime is 1311500357. The reversal of 1311500343 is 3430051131.

It is an interprime number because it is at equal distance from previous prime (1311500329) and next prime (1311500357).

It is not a de Polignac number, because 1311500343 - 2⁶ = 1311500279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311500303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91471 + ... + 104832.

It is an arithmetic number, because the mean of its divisors is an integer number (116604576).

Almost surely, 2^1311500343 is an apocalyptic number.

1311500343 is a deficient number, since it is larger than the sum of its proper divisors (554172873).

1311500343 is a wasteful number, since it uses less digits than its factorization.

1311500343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196454.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1311500343 is about 36214.6426601175. The cubic root of 1311500343 is about 1094.6017450398.

Adding to 1311500343 its reverse (3430051131), we get a palindrome (4741551474).

The spelling of 1311500343 in words is "one billion, three hundred eleven million, five hundred thousand, three hundred forty-three".