1315312403 has 2 divisors, whose sum is σ = 1315312404. Its totient is φ = 1315312402.

The previous prime is 1315312333. The next prime is 1315312447. The reversal of 1315312403 is 3042135131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1315312403 - 2¹⁰ = 1315311379 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1315312303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657656201 + 657656202.

It is an arithmetic number, because the mean of its divisors is an integer number (657656202).

Almost surely, 2^1315312403 is an apocalyptic number.

1315312403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315312403 is an equidigital number, since it uses as much as digits as its factorization.

1315312403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1315312403 is about 36267.2359437551. The cubic root of 1315312403 is about 1095.6612570794.

Adding to 1315312403 its reverse (3042135131), we get a palindrome (4357447534).

The spelling of 1315312403 in words is "one billion, three hundred fifteen million, three hundred twelve thousand, four hundred three".