1311311522 has 8 divisors (see below), whose sum is σ = 1990665936. Its totient is φ = 647756212.

The previous prime is 1311311513. The next prime is 1311311527. The reversal of 1311311522 is 2251131131.

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

It is a junction number, because it is equal to n+sod(n) for n = 1311311494 and 1311311503.

It is not an unprimeable number, because it can be changed into a prime (1311311527) 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, 3949568 + ... + 3949899.

It is an arithmetic number, because the mean of its divisors is an integer number (248833242).

Almost surely, 2^1311311522 is an apocalyptic number.

1311311522 is a deficient number, since it is larger than the sum of its proper divisors (679354414).

1311311522 is an equidigital number, since it uses as much as digits as its factorization.

1311311522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7899552.

The product of its digits is 180, while the sum is 20.

The square root of 1311311522 is about 36212.0355959176. The cubic root of 1311311522 is about 1094.5492113858.

Adding to 1311311522 its reverse (2251131131), we get a palindrome (3562442653).

The spelling of 1311311522 in words is "one billion, three hundred eleven million, three hundred eleven thousand, five hundred twenty-two".