1315520209 has 8 divisors (see below), whose sum is σ = 1326523968. Its totient is φ = 1304531280.

The previous prime is 1315520207. The next prime is 1315520263. The reversal of 1315520209 is 9020255131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1315520209 - 2¹ = 1315520207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315520207) by changing a digit.

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, 239239 + ... + 244675.

It is an arithmetic number, because the mean of its divisors is an integer number (165815496).

Almost surely, 2^1315520209 is an apocalyptic number.

It is an amenable number.

1315520209 is a deficient number, since it is larger than the sum of its proper divisors (11003759).

1315520209 is a wasteful number, since it uses less digits than its factorization.

1315520209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7415.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 1315520209 is about 36270.1007580624. The cubic root of 1315520209 is about 1095.7189551575.

The spelling of 1315520209 in words is "one billion, three hundred fifteen million, five hundred twenty thousand, two hundred nine".