1311334205 has 8 divisors (see below), whose sum is σ = 1616131032. Its totient is φ = 1020714048.

The previous prime is 1311334187. The next prime is 1311334223. The reversal of 1311334205 is 5024331131.

It is an interprime number because it is at equal distance from previous prime (1311334187) and next prime (1311334223).

It can be written as a sum of positive squares in 4 ways, for example, as 355473316 + 955860889 = 18854^2 + 30917^2 .

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 1311334205 - 2⁸ = 1311333949 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 7 ways as a sum of consecutive naturals, for example, 3543962 + ... + 3544331.

It is an arithmetic number, because the mean of its divisors is an integer number (202016379).

Almost surely, 2^1311334205 is an apocalyptic number.

It is an amenable number.

1311334205 is a deficient number, since it is larger than the sum of its proper divisors (304796827).

1311334205 is an equidigital number, since it uses as much as digits as its factorization.

1311334205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7088335.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1311334205 is about 36212.3487915379. The cubic root of 1311334205 is about 1094.5555225016. Note that the first 4 decimals are identical.

Adding to 1311334205 its reverse (5024331131), we get a palindrome (6335665336).

The spelling of 1311334205 in words is "one billion, three hundred eleven million, three hundred thirty-four thousand, two hundred five".