1311422513 has 4 divisors (see below), whose sum is σ = 1336166388. Its totient is φ = 1286678640.

The previous prime is 1311422509. The next prime is 1311422549. The reversal of 1311422513 is 3152241131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 934402624 + 377019889 = 30568^2 + 19417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311422513 - 2² = 1311422509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311422813) 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, 12371858 + ... + 12371963.

It is an arithmetic number, because the mean of its divisors is an integer number (334041597).

Almost surely, 2^1311422513 is an apocalyptic number.

It is an amenable number.

1311422513 is a deficient number, since it is larger than the sum of its proper divisors (24743875).

1311422513 is an equidigital number, since it uses as much as digits as its factorization.

1311422513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24743874.

The product of its digits is 720, while the sum is 23.

The square root of 1311422513 is about 36213.5680788292. The cubic root of 1311422513 is about 1094.5800918395.

Adding to 1311422513 its reverse (3152241131), we get a palindrome (4463663644).

The spelling of 1311422513 in words is "one billion, three hundred eleven million, four hundred twenty-two thousand, five hundred thirteen".