1315255320 has 160 divisors (see below), whose sum is σ = 4680957600. Its totient is φ = 330089472.

The previous prime is 1315255219. The next prime is 1315255351. The reversal of 1315255320 is 235525131.

It is a happy number.

1315255320 is a `hidden beast` number, since 1 + 315 + 25 + 5 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent 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 39 ways as a sum of consecutive naturals, for example, 43141 + ... + 67019.

It is an arithmetic number, because the mean of its divisors is an integer number (29255985).

Almost surely, 2^1315255320 is an apocalyptic number.

1315255320 is a gapful number since it is divisible by the number (10) 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 1315255320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340478800).

1315255320 is an abundant number, since it is smaller than the sum of its proper divisors (3365702280).

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

1315255320 is a wasteful number, since it uses less digits than its factorization.

1315255320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23919 (or 23906 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1315255320 is about 36266.4489576799. The cubic root of 1315255320 is about 1095.6454067166.

The spelling of 1315255320 in words is "one billion, three hundred fifteen million, two hundred fifty-five thousand, three hundred twenty".