1313230331 has 12 divisors (see below), whose sum is σ = 1617497208. Its totient is φ = 1059412032.

The previous prime is 1313230309. The next prime is 1313230393. The reversal of 1313230331 is 1330323131.

It is a de Polignac number, because none of the positive numbers 2^k-1313230331 is a prime.

It is a super-2 number, since 2×1313230331² = 3449147804516739122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313230301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 787421 + ... + 789086.

It is an arithmetic number, because the mean of its divisors is an integer number (134791434).

Almost surely, 2^1313230331 is an apocalyptic number.

1313230331 is a deficient number, since it is larger than the sum of its proper divisors (304266877).

1313230331 is a wasteful number, since it uses less digits than its factorization.

1313230331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576538 (or 1576531 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1313230331 is about 36238.5199890945. The cubic root of 1313230331 is about 1095.0828265920.

Adding to 1313230331 its reverse (1330323131), we get a palindrome (2643553462).

The spelling of 1313230331 in words is "one billion, three hundred thirteen million, two hundred thirty thousand, three hundred thirty-one".