1311300505 has 4 divisors (see below), whose sum is σ = 1573560612. Its totient is φ = 1049040400.

The previous prime is 1311300421. The next prime is 1311300553. The reversal of 1311300505 is 5050031131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5050031131 = 41 ⋅123171491.

It can be written as a sum of positive squares in 2 ways, for example, as 967272201 + 344028304 = 31101^2 + 18548^2 .

It is not a de Polignac number, because 1311300505 - 2¹³ = 1311292313 is a prime.

It is a Duffinian 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, 131130046 + ... + 131130055.

It is an arithmetic number, because the mean of its divisors is an integer number (393390153).

Almost surely, 2^1311300505 is an apocalyptic number.

It is an amenable number.

1311300505 is a deficient number, since it is larger than the sum of its proper divisors (262260107).

1311300505 is an equidigital number, since it uses as much as digits as its factorization.

1311300505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262260106.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 1311300505 is about 36211.8834776652. The cubic root of 1311300505 is about 1094.5461460876.

Adding to 1311300505 its reverse (5050031131), we get a palindrome (6361331636).

The spelling of 1311300505 in words is "one billion, three hundred eleven million, three hundred thousand, five hundred five".