1313243811 has 24 divisors (see below), whose sum is σ = 2159329536. Its totient is φ = 761299440.

The previous prime is 1313243803. The next prime is 1313243831. The reversal of 1313243811 is 1183423131.

It is not a de Polignac number, because 1313243811 - 2³ = 1313243803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313243831) 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 23 ways as a sum of consecutive naturals, for example, 286095 + ... + 290648.

It is an arithmetic number, because the mean of its divisors is an integer number (89972064).

Almost surely, 2^1313243811 is an apocalyptic number.

1313243811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1313243811 is a deficient number, since it is larger than the sum of its proper divisors (846085725).

1313243811 is a wasteful number, since it uses less digits than its factorization.

1313243811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576783 (or 576780 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1313243811 is about 36238.7059785528. The cubic root of 1313243811 is about 1095.0865735016.

Adding to 1313243811 its reverse (1183423131), we get a palindrome (2496666942).

The spelling of 1313243811 in words is "one billion, three hundred thirteen million, two hundred forty-three thousand, eight hundred eleven".