1311253501443 has 16 divisors (see below), whose sum is σ = 1789798187520. Its totient is φ = 853527689696.

The previous prime is 1311253501321. The next prime is 1311253501463. The reversal of 1311253501443 is 3441053521131.

It is a cyclic number.

It is not a de Polignac number, because 1311253501443 - 2¹⁸ = 1311253239299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311253501463) 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, 11038380 + ... + 11156537.

It is an arithmetic number, because the mean of its divisors is an integer number (111862386720).

Almost surely, 2^{1311253501443} is an apocalyptic number.

1311253501443 is a deficient number, since it is larger than the sum of its proper divisors (478544686077).

1311253501443 is a wasteful number, since it uses less digits than its factorization.

1311253501443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22195386.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 1311253501443 in words is "one trillion, three hundred eleven billion, two hundred fifty-three million, five hundred one thousand, four hundred forty-three".