1131313313 has 4 divisors (see below), whose sum is σ = 1218337428. Its totient is φ = 1044289200.

The previous prime is 1131313283. The next prime is 1131313319. The reversal of 1131313313 is 3133131311.

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 600103009 + 531210304 = 24497^2 + 23048^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131313313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131313319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43512038 + ... + 43512063.

It is an arithmetic number, because the mean of its divisors is an integer number (304584357).

Almost surely, 2^1131313313 is an apocalyptic number.

1131313313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1131313313 is a deficient number, since it is larger than the sum of its proper divisors (87024115).

1131313313 is an equidigital number, since it uses as much as digits as its factorization.

1131313313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87024114.

The product of its digits is 243, while the sum is 20.

The square root of 1131313313 is about 33635.0013081611. The cubic root of 1131313313 is about 1041.9837976391.

Adding to 1131313313 its reverse (3133131311), we get a palindrome (4264444624).

The spelling of 1131313313 in words is "one billion, one hundred thirty-one million, three hundred thirteen thousand, three hundred thirteen".