1311013043 has 4 divisors (see below), whose sum is σ = 1311767808. Its totient is φ = 1310258280.

The previous prime is 1311012973. The next prime is 1311013049. The reversal of 1311013043 is 3403101131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3403101131 = 1471 ⋅2313461.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311013043 is a prime.

It is a super-2 number, since 2×1311013043² = 3437510397832239698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311013049) 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, 374771 + ... + 378252.

It is an arithmetic number, because the mean of its divisors is an integer number (327941952).

Almost surely, 2^1311013043 is an apocalyptic number.

1311013043 is a deficient number, since it is larger than the sum of its proper divisors (754765).

1311013043 is an equidigital number, since it uses as much as digits as its factorization.

1311013043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754764.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1311013043 is about 36207.9140934686. The cubic root of 1311013043 is about 1094.4661584678.

Adding to 1311013043 its reverse (3403101131), we get a palindrome (4714114174).

The spelling of 1311013043 in words is "one billion, three hundred eleven million, thirteen thousand, forty-three".