1315375321 has 4 divisors (see below), whose sum is σ = 1416558052. Its totient is φ = 1214192592.

The previous prime is 1315375319. The next prime is 1315375351. The reversal of 1315375321 is 1235735131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71825625 + 1243549696 = 8475^2 + 35264^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315375321 - 2¹ = 1315375319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1315375351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50591346 + ... + 50591371.

It is an arithmetic number, because the mean of its divisors is an integer number (354139513).

Almost surely, 2^1315375321 is an apocalyptic number.

It is an amenable number.

1315375321 is a deficient number, since it is larger than the sum of its proper divisors (101182731).

1315375321 is a wasteful number, since it uses less digits than its factorization.

1315375321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101182730.

The product of its digits is 9450, while the sum is 31.

The square root of 1315375321 is about 36268.1033554279. The cubic root of 1315375321 is about 1095.6787271282.

The spelling of 1315375321 in words is "one billion, three hundred fifteen million, three hundred seventy-five thousand, three hundred twenty-one".