1315505040 has 80 divisors (see below), whose sum is σ = 4135556736. Its totient is φ = 345856000.

The previous prime is 1315505039. The next prime is 1315505053. The reversal of 1315505040 is 405055131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1315505040.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21561 + ... + 55640.

Almost surely, 2^1315505040 is an apocalyptic number.

1315505040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315505040 is an abundant number, since it is smaller than the sum of its proper divisors (2820051696).

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

1315505040 is a wasteful number, since it uses less digits than its factorization.

1315505040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77288 (or 77282 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1315505040 is about 36269.8916458266. The cubic root of 1315505040 is about 1095.7147436361.

The spelling of 1315505040 in words is "one billion, three hundred fifteen million, five hundred five thousand, forty".