1315520136 has 128 divisors (see below), whose sum is σ = 4185446400. Its totient is φ = 375036480.

The previous prime is 1315520117. The next prime is 1315520159. The reversal of 1315520136 is 6310255131.

1315520136 is a `hidden beast` number, since 1 + 3 + 1 + 5 + 520 + 136 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1122831 + ... + 1124001.

It is an arithmetic number, because the mean of its divisors is an integer number (32698800).

Almost surely, 2^1315520136 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 1315520136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2092723200).

1315520136 is an abundant number, since it is smaller than the sum of its proper divisors (2869926264).

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

1315520136 is a wasteful number, since it uses less digits than its factorization.

1315520136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936 (or 1926 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1315520136 is about 36270.0997517239. The cubic root of 1315520136 is about 1095.7189348899.

Adding to 1315520136 its reverse (6310255131), we get a palindrome (7625775267).

The spelling of 1315520136 in words is "one billion, three hundred fifteen million, five hundred twenty thousand, one hundred thirty-six".