1311132503 has 8 divisors (see below), whose sum is σ = 1377324000. Its totient is φ = 1245706528.

The previous prime is 1311132461. The next prime is 1311132541. The reversal of 1311132503 is 3052311131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311132503 - 2¹² = 1311128407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311132583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187868 + ... + 194721.

It is an arithmetic number, because the mean of its divisors is an integer number (172165500).

Almost surely, 2^1311132503 is an apocalyptic number.

1311132503 is a deficient number, since it is larger than the sum of its proper divisors (66191497).

1311132503 is a wasteful number, since it uses less digits than its factorization.

1311132503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382761.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1311132503 is about 36209.5636952449. The cubic root of 1311132503 is about 1094.4994001804.

Adding to 1311132503 its reverse (3052311131), we get a palindrome (4363443634).

The spelling of 1311132503 in words is "one billion, three hundred eleven million, one hundred thirty-two thousand, five hundred three".