1231230313 has 4 divisors (see below), whose sum is σ = 1237417600. Its totient is φ = 1225043028.

The previous prime is 1231230263. The next prime is 1231230323. The reversal of 1231230313 is 3130321321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3130321321 = 23 ⋅136100927.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231230313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231230323) 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, 3093345 + ... + 3093742.

It is an arithmetic number, because the mean of its divisors is an integer number (309354400).

Almost surely, 2^1231230313 is an apocalyptic number.

It is an amenable number.

1231230313 is a deficient number, since it is larger than the sum of its proper divisors (6187287).

1231230313 is an equidigital number, since it uses as much as digits as its factorization.

1231230313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187286.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1231230313 is about 35088.8915897895. The cubic root of 1231230313 is about 1071.7983886210.

Adding to 1231230313 its reverse (3130321321), we get a palindrome (4361551634).

The spelling of 1231230313 in words is "one billion, two hundred thirty-one million, two hundred thirty thousand, three hundred thirteen".