1331313 has 4 divisors (see below), whose sum is σ = 1775088.
Its totient is φ = 887540.
The previous prime is 1331299. The next prime is 1331327. The reversal of 1331313 is 3131331.
Adding to 1331313 its reverse (3131331), we get a palindrome (4462644).
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 an interprime number because it is at equal distance from previous prime (1331299) and next prime (1331327).
It is a cyclic number.
It is not a de Polignac number, because 1331313 - 26 = 1331249 is a prime.
It is a nude number because it is divisible by every one of its digits.
It is a D-number.
It is a junction number, because it is equal to n+sod(n) for n = 1331292 and 1331301.
It is not an unprimeable number, because it can be changed into a prime (1331333) 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, 221883 + ... + 221888.
It is an arithmetic number, because the mean of its divisors is an integer number (443772).
21331313 is an apocalyptic number.
It is an amenable number.
1331313 is a deficient number, since it is larger than the sum of its proper divisors (443775).
1331313 is an equidigital number, since it uses as much as digits as its factorization.
1331313 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 443774.
The product of its digits is 81, while the sum is 15.
The square root of 1331313 is about 1153.8253767360.
The cubic root of 1331313 is about 110.0086219137.
The spelling of 1331313 in words is "one million, three hundred thirty-one thousand, three hundred thirteen".