1311332135 has 4 divisors (see below), whose sum is σ = 1573598568. Its totient is φ = 1049065704.

The previous prime is 1311332129. The next prime is 1311332137. The reversal of 1311332135 is 5312331131.

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 1311332135 - 2¹⁰ = 1311331111 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 1311332135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311332137) 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, 131133209 + ... + 131133218.

It is an arithmetic number, because the mean of its divisors is an integer number (393399642).

Almost surely, 2^1311332135 is an apocalyptic number.

1311332135 is a deficient number, since it is larger than the sum of its proper divisors (262266433).

1311332135 is an equidigital number, since it uses as much as digits as its factorization.

1311332135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262266432.

The product of its digits is 810, while the sum is 23.

The square root of 1311332135 is about 36212.3202101163. The cubic root of 1311332135 is about 1094.5549465663.

Adding to 1311332135 its reverse (5312331131), we get a palindrome (6623663266).

The spelling of 1311332135 in words is "one billion, three hundred eleven million, three hundred thirty-two thousand, one hundred thirty-five".