1312115552 has 48 divisors (see below), whose sum is σ = 2829484224. Its totient is φ = 594000000.

The previous prime is 1312115507. The next prime is 1312115587. The reversal of 1312115552 is 2555112131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80927 + ... + 95777.

It is an arithmetic number, because the mean of its divisors is an integer number (58947588).

Almost surely, 2^1312115552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312115552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414742112).

1312115552 is an abundant number, since it is smaller than the sum of its proper divisors (1517368672).

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

1312115552 is a wasteful number, since it uses less digits than its factorization.

1312115552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15123 (or 15115 counting only the distinct ones).

The product of its digits is 1500, while the sum is 26.

The square root of 1312115552 is about 36223.1355903931. The cubic root of 1312115552 is about 1094.7728731121.

Adding to 1312115552 its reverse (2555112131), we get a palindrome (3867227683).

The spelling of 1312115552 in words is "one billion, three hundred twelve million, one hundred fifteen thousand, five hundred fifty-two".