1311511312 has 40 divisors (see below), whose sum is σ = 2684649600. Its totient is φ = 619661952.

The previous prime is 1311511301. The next prime is 1311511319. The reversal of 1311511312 is 2131151131.

It is a super-2 number, since 2×1311511312² = 3440123843007922688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1311511312.

It is not an unprimeable number, because it can be changed into a prime (1311511319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8262 + ... + 51877.

It is an arithmetic number, because the mean of its divisors is an integer number (67116240).

Almost surely, 2^1311511312 is an apocalyptic number.

It is an amenable number.

1311511312 is an abundant number, since it is smaller than the sum of its proper divisors (1373138288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311511312 is a wasteful number, since it uses less digits than its factorization.

1311511312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60223 (or 60217 counting only the distinct ones).

The product of its digits is 90, while the sum is 19.

The square root of 1311511312 is about 36214.7941040675. The cubic root of 1311511312 is about 1094.6047966728.

Adding to 1311511312 its reverse (2131151131), we get a palindrome (3442662443).

The spelling of 1311511312 in words is "one billion, three hundred eleven million, five hundred eleven thousand, three hundred twelve".