1315511005 has 4 divisors (see below), whose sum is σ = 1578613212. Its totient is φ = 1052408800.

The previous prime is 1315511003. The next prime is 1315511033. The reversal of 1315511005 is 5001155131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 407151684 + 908359321 = 20178^2 + 30139^2 .

It is not a de Polignac number, because 1315511005 - 2¹ = 1315511003 is a prime.

It is a super-2 number, since 2×1315511005² = 3461138408552220050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315511003) 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 in 3 ways as a sum of consecutive naturals, for example, 131551096 + ... + 131551105.

It is an arithmetic number, because the mean of its divisors is an integer number (394653303).

Almost surely, 2^1315511005 is an apocalyptic number.

It is an amenable number.

1315511005 is a deficient number, since it is larger than the sum of its proper divisors (263102207).

1315511005 is an equidigital number, since it uses as much as digits as its factorization.

1315511005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263102206.

The product of its (nonzero) digits is 375, while the sum is 22.

The square root of 1315511005 is about 36269.9738764725. The cubic root of 1315511005 is about 1095.7163997627.

Adding to 1315511005 its reverse (5001155131), we get a palindrome (6316666136).

The spelling of 1315511005 in words is "one billion, three hundred fifteen million, five hundred eleven thousand, five".