1315101255491 has 2 divisors, whose sum is σ = 1315101255492. Its totient is φ = 1315101255490.

The previous prime is 1315101255463. The next prime is 1315101255541. The reversal of 1315101255491 is 1945521015131.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1945521015131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1315101255491 - 2¹⁴ = 1315101239107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1315101255451) 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 as a sum of consecutive naturals, namely, 657550627745 + 657550627746.

It is an arithmetic number, because the mean of its divisors is an integer number (657550627746).

Almost surely, 2^{1315101255491} is an apocalyptic number.

1315101255491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315101255491 is an equidigital number, since it uses as much as digits as its factorization.

1315101255491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 1315101255491 in words is "one trillion, three hundred fifteen billion, one hundred one million, two hundred fifty-five thousand, four hundred ninety-one".