1311330043 has 4 divisors (see below), whose sum is σ = 1321340328. Its totient is φ = 1301319760.

The previous prime is 1311330017. The next prime is 1311330067. The reversal of 1311330043 is 3400331131.

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

It is a cyclic number.

It is not a de Polignac number, because 1311330043 - 2⁹ = 1311329531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311330043.

It is not an unprimeable number, because it can be changed into a prime (1311330743) 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, 5004946 + ... + 5005207.

It is an arithmetic number, because the mean of its divisors is an integer number (330335082).

Almost surely, 2^1311330043 is an apocalyptic number.

1311330043 is a deficient number, since it is larger than the sum of its proper divisors (10010285).

1311330043 is a wasteful number, since it uses less digits than its factorization.

1311330043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010284.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1311330043 is about 36212.2913249079. The cubic root of 1311330043 is about 1094.5543645092.

Adding to 1311330043 its reverse (3400331131), we get a palindrome (4711661174).

The spelling of 1311330043 in words is "one billion, three hundred eleven million, three hundred thirty thousand, forty-three".