1313331133 has 4 divisors (see below), whose sum is σ = 1313950140. Its totient is φ = 1312712128.

The previous prime is 1313331127. The next prime is 1313331191. The reversal of 1313331133 is 3311333131.

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 549527364 + 763803769 = 23442^2 + 27637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313331133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313331193) 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, 306310 + ... + 310567.

It is an arithmetic number, because the mean of its divisors is an integer number (328487535).

Almost surely, 2^1313331133 is an apocalyptic number.

It is an amenable number.

1313331133 is a deficient number, since it is larger than the sum of its proper divisors (619007).

1313331133 is an equidigital number, since it uses as much as digits as its factorization.

1313331133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619006.

The product of its digits is 729, while the sum is 22.

The square root of 1313331133 is about 36239.9107752765. The cubic root of 1313331133 is about 1095.1108449607.

Adding to 1313331133 its reverse (3311333131), we get a palindrome (4624664264).

The spelling of 1313331133 in words is "one billion, three hundred thirteen million, three hundred thirty-one thousand, one hundred thirty-three".