1315322144 has 48 divisors (see below), whose sum is σ = 2716701120. Its totient is φ = 626008320.

The previous prime is 1315322123. The next prime is 1315322161. The reversal of 1315322144 is 4412235131.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 55907 + ... + 75869.

It is an arithmetic number, because the mean of its divisors is an integer number (56597940).

Almost surely, 2^1315322144 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 1315322144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1358350560).

1315322144 is an abundant number, since it is smaller than the sum of its proper divisors (1401378976).

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

1315322144 is a wasteful number, since it uses less digits than its factorization.

1315322144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20073 (or 20065 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 1315322144 is about 36267.3702382734. The cubic root of 1315322144 is about 1095.6639618386.

Adding to 1315322144 its reverse (4412235131), we get a palindrome (5727557275).

The spelling of 1315322144 in words is "one billion, three hundred fifteen million, three hundred twenty-two thousand, one hundred forty-four".