1310320205 has 4 divisors (see below), whose sum is σ = 1572384252. Its totient is φ = 1048256160.

The previous prime is 1310320157. The next prime is 1310320223. The reversal of 1310320205 is 5020230131.

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 673817764 + 636502441 = 25958^2 + 25229^2 .

It is not a de Polignac number, because 1310320205 - 2⁸ = 1310319949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131032016 + ... + 131032025.

It is an arithmetic number, because the mean of its divisors is an integer number (393096063).

Almost surely, 2^1310320205 is an apocalyptic number.

It is an amenable number.

1310320205 is a deficient number, since it is larger than the sum of its proper divisors (262064047).

1310320205 is an equidigital number, since it uses as much as digits as its factorization.

1310320205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262064046.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1310320205 is about 36198.3453351117. The cubic root of 1310320205 is about 1094.2733250539.

Adding to 1310320205 its reverse (5020230131), we get a palindrome (6330550336).

The spelling of 1310320205 in words is "one billion, three hundred ten million, three hundred twenty thousand, two hundred five".