1311175505 has 8 divisors (see below), whose sum is σ = 1579011624. Its totient is φ = 1045206400.

The previous prime is 1311175493. The next prime is 1311175519. The reversal of 1311175505 is 5055711131.

It can be written as a sum of positive squares in 4 ways, for example, as 193543744 + 1117631761 = 13912^2 + 33431^2 .

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

It is not a de Polignac number, because 1311175505 - 2⁸ = 1311175249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465206 + ... + 468015.

It is an arithmetic number, because the mean of its divisors is an integer number (197376453).

Almost surely, 2^1311175505 is an apocalyptic number.

It is an amenable number.

1311175505 is a deficient number, since it is larger than the sum of its proper divisors (267836119).

1311175505 is an equidigital number, since it uses as much as digits as its factorization.

1311175505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933507.

The product of its (nonzero) digits is 2625, while the sum is 29.

The square root of 1311175505 is about 36210.1574837779. The cubic root of 1311175505 is about 1094.5113657009.

Adding to 1311175505 its reverse (5055711131), we get a palindrome (6366886636).

The spelling of 1311175505 in words is "one billion, three hundred eleven million, one hundred seventy-five thousand, five hundred five".