1315394533 has 4 divisors (see below), whose sum is σ = 1392770700. Its totient is φ = 1238018368.

The previous prime is 1315394497. The next prime is 1315394579. The reversal of 1315394533 is 3354935131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3354935131 = 443 ⋅7573217.

It can be written as a sum of positive squares in 2 ways, for example, as 823575204 + 491819329 = 28698^2 + 22177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315394533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1315394492 and 1315394501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315394933) 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, 38688058 + ... + 38688091.

It is an arithmetic number, because the mean of its divisors is an integer number (348192675).

Almost surely, 2^1315394533 is an apocalyptic number.

It is an amenable number.

1315394533 is a deficient number, since it is larger than the sum of its proper divisors (77376167).

1315394533 is an equidigital number, since it uses as much as digits as its factorization.

1315394533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77376166.

The product of its digits is 72900, while the sum is 37.

The square root of 1315394533 is about 36268.3682152920. The cubic root of 1315394533 is about 1095.6840614935.

The spelling of 1315394533 in words is "one billion, three hundred fifteen million, three hundred ninety-four thousand, five hundred thirty-three".