1315526813 has 8 divisors (see below), whose sum is σ = 1322536800. Its totient is φ = 1308536208.

The previous prime is 1315526809. The next prime is 1315526867. The reversal of 1315526813 is 3186255131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1315526813 - 2² = 1315526809 is a prime.

It is a super-2 number, since 2×1315526813² = 3461221591443873938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315526873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142970 + ... + 151892.

It is an arithmetic number, because the mean of its divisors is an integer number (165317100).

Almost surely, 2^1315526813 is an apocalyptic number.

It is an amenable number.

1315526813 is a deficient number, since it is larger than the sum of its proper divisors (7009987).

1315526813 is an equidigital number, since it uses as much as digits as its factorization.

1315526813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9691.

The product of its digits is 21600, while the sum is 35.

The square root of 1315526813 is about 36270.1917971218. The cubic root of 1315526813 is about 1095.7207886821.

The spelling of 1315526813 in words is "one billion, three hundred fifteen million, five hundred twenty-six thousand, eight hundred thirteen".