1231323313 has 8 divisors (see below), whose sum is σ = 1343517696. Its totient is φ = 1119171600.

The previous prime is 1231323307. The next prime is 1231323319. The reversal of 1231323313 is 3133231321.

It is an interprime number because it is at equal distance from previous prime (1231323307) and next prime (1231323319).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231323313 is a prime.

It is a super-2 number, since 2×1231323313² = 3032314202274591938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231323319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96783 + ... + 108763.

It is an arithmetic number, because the mean of its divisors is an integer number (167939712).

Almost surely, 2^1231323313 is an apocalyptic number.

It is an amenable number.

1231323313 is a deficient number, since it is larger than the sum of its proper divisors (112194383).

1231323313 is a wasteful number, since it uses less digits than its factorization.

1231323313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21335.

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

The square root of 1231323313 is about 35090.2167704903. The cubic root of 1231323313 is about 1071.8253737538.

Adding to 1231323313 its reverse (3133231321), we get a palindrome (4364554634).

The spelling of 1231323313 in words is "one billion, two hundred thirty-one million, three hundred twenty-three thousand, three hundred thirteen".