1313322133 has 4 divisors (see below), whose sum is σ = 1321379488. Its totient is φ = 1305264780.

The previous prime is 1313322121. The next prime is 1313322167. The reversal of 1313322133 is 3312233131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313322133 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 (1313322433) 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, 4028433 + ... + 4028758.

It is an arithmetic number, because the mean of its divisors is an integer number (330344872).

Almost surely, 2^1313322133 is an apocalyptic number.

It is an amenable number.

1313322133 is a deficient number, since it is larger than the sum of its proper divisors (8057355).

1313322133 is an equidigital number, since it uses as much as digits as its factorization.

1313322133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8057354.

The product of its digits is 972, while the sum is 22.

The square root of 1313322133 is about 36239.7866025726. The cubic root of 1313322133 is about 1095.1083434286.

Adding to 1313322133 its reverse (3312233131), we get a palindrome (4625555264).

The spelling of 1313322133 in words is "one billion, three hundred thirteen million, three hundred twenty-two thousand, one hundred thirty-three".