1313310331 has 4 divisors (see below), whose sum is σ = 1341253152. Its totient is φ = 1285367512.

The previous prime is 1313310307. The next prime is 1313310337. The reversal of 1313310331 is 1330133131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1313310331 - 2⁹ = 1313309819 is a prime.

It is a super-2 number, since 2×1313310331² = 3449568051022659122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313310299 and 1313310308.

It is not an unprimeable number, because it can be changed into a prime (1313310337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13971340 + ... + 13971433.

It is an arithmetic number, because the mean of its divisors is an integer number (335313288).

Almost surely, 2^1313310331 is an apocalyptic number.

1313310331 is a deficient number, since it is larger than the sum of its proper divisors (27942821).

1313310331 is an equidigital number, since it uses as much as digits as its factorization.

1313310331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27942820.

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 1313310331 is about 36239.6237701221. The cubic root of 1313310331 is about 1095.1050630688.

Adding to 1313310331 its reverse (1330133131), we get a palindrome (2643443462).

The spelling of 1313310331 in words is "one billion, three hundred thirteen million, three hundred ten thousand, three hundred thirty-one".