1315443401515 has 4 divisors (see below), whose sum is σ = 1578532081824. Its totient is φ = 1052354721208.

The previous prime is 1315443401449. The next prime is 1315443401527. The reversal of 1315443401515 is 5151043445131.

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

It is a cyclic number.

It is not a de Polignac number, because 1315443401515 - 2¹⁷ = 1315443270443 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131544340147 + ... + 131544340156.

It is an arithmetic number, because the mean of its divisors is an integer number (394633020456).

Almost surely, 2^{1315443401515} is an apocalyptic number.

1315443401515 is a deficient number, since it is larger than the sum of its proper divisors (263088680309).

1315443401515 is an equidigital number, since it uses as much as digits as its factorization.

1315443401515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263088680308.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 1315443401515 its reverse (5151043445131), we get a palindrome (6466486846646).

The spelling of 1315443401515 in words is "one trillion, three hundred fifteen billion, four hundred forty-three million, four hundred one thousand, five hundred fifteen".