1315565140 has 24 divisors (see below), whose sum is σ = 2767010400. Its totient is φ = 525402528.

The previous prime is 1315565137. The next prime is 1315565161. The reversal of 1315565140 is 415655131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38290 + ... + 64009.

It is an arithmetic number, because the mean of its divisors is an integer number (115292100).

Almost surely, 2^1315565140 is an apocalyptic number.

1315565140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315565140 is an abundant number, since it is smaller than the sum of its proper divisors (1451445260).

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

1315565140 is a wasteful number, since it uses less digits than its factorization.

1315565140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102951 (or 102949 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 1315565140 is about 36270.7201472482. The cubic root of 1315565140 is about 1095.7314296113.

The spelling of 1315565140 in words is "one billion, three hundred fifteen million, five hundred sixty-five thousand, one hundred forty".