1311515052 has 96 divisors (see below), whose sum is σ = 3317825280. Its totient is φ = 401863680.

The previous prime is 1311515003. The next prime is 1311515063. The reversal of 1311515052 is 2505151131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2869608 + ... + 2870064.

It is an arithmetic number, because the mean of its divisors is an integer number (34560680).

Almost surely, 2^1311515052 is an apocalyptic number.

1311515052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311515052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658912640).

1311515052 is an abundant number, since it is smaller than the sum of its proper divisors (2006310228).

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

1311515052 is a wasteful number, since it uses less digits than its factorization.

1311515052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 829 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1311515052 is about 36214.8457403866. The cubic root of 1311515052 is about 1094.6058371564.

Adding to 1311515052 its reverse (2505151131), we get a palindrome (3816666183).

The spelling of 1311515052 in words is "one billion, three hundred eleven million, five hundred fifteen thousand, fifty-two".