1311512063 has 4 divisors (see below), whose sum is σ = 1318758168. Its totient is φ = 1304265960.

The previous prime is 1311512053. The next prime is 1311512077. The reversal of 1311512063 is 3602151131.

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 1311512063 - 2⁸ = 1311511807 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 (1311512053) 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, 3622781 + ... + 3623142.

It is an arithmetic number, because the mean of its divisors is an integer number (329689542).

Almost surely, 2^1311512063 is an apocalyptic number.

1311512063 is a deficient number, since it is larger than the sum of its proper divisors (7246105).

1311512063 is an equidigital number, since it uses as much as digits as its factorization.

1311512063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7246104.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1311512063 is about 36214.8044727567. The cubic root of 1311512063 is about 1094.6050056043.

Adding to 1311512063 its reverse (3602151131), we get a palindrome (4913663194).

The spelling of 1311512063 in words is "one billion, three hundred eleven million, five hundred twelve thousand, sixty-three".