1231232313 has 8 divisors (see below), whose sum is σ = 1686011968. Its totient is φ = 798637104.

The previous prime is 1231232311. The next prime is 1231232333. The reversal of 1231232313 is 3132321321.

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

It is not a de Polignac number, because 1231232313 - 2¹ = 1231232311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231232313.

It is not an unprimeable number, because it can be changed into a prime (1231232311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5545981 + ... + 5546202.

It is an arithmetic number, because the mean of its divisors is an integer number (210751496).

Almost surely, 2^1231232313 is an apocalyptic number.

It is an amenable number.

1231232313 is a deficient number, since it is larger than the sum of its proper divisors (454779655).

1231232313 is a wasteful number, since it uses less digits than its factorization.

1231232313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092223.

The product of its digits is 648, while the sum is 21.

The square root of 1231232313 is about 35088.9200888258. The cubic root of 1231232313 is about 1071.7989689607.

Adding to 1231232313 its reverse (3132321321), we get a palindrome (4363553634).

The spelling of 1231232313 in words is "one billion, two hundred thirty-one million, two hundred thirty-two thousand, three hundred thirteen".