1312351513 has 4 divisors (see below), whose sum is σ = 1431656208. Its totient is φ = 1193046820.

The previous prime is 1312351511. The next prime is 1312351519. The reversal of 1312351513 is 3151532131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1312351513 - 2¹ = 1312351511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312351511) 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, 59652331 + ... + 59652352.

It is an arithmetic number, because the mean of its divisors is an integer number (357914052).

Almost surely, 2^1312351513 is an apocalyptic number.

It is an amenable number.

1312351513 is a deficient number, since it is larger than the sum of its proper divisors (119304695).

1312351513 is a wasteful number, since it uses less digits than its factorization.

1312351513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119304694.

The product of its digits is 1350, while the sum is 25.

The square root of 1312351513 is about 36226.3924922148. The cubic root of 1312351513 is about 1094.8384944206.

Adding to 1312351513 its reverse (3151532131), we get a palindrome (4463883644).

The spelling of 1312351513 in words is "one billion, three hundred twelve million, three hundred fifty-one thousand, five hundred thirteen".