3123313231 has 4 divisors (see below), whose sum is σ = 3189766752. Its totient is φ = 3056859712.

The previous prime is 3123313139. The next prime is 3123313241. The reversal of 3123313231 is 1323133213.

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 3123313231 - 2¹⁷ = 3123182159 is a prime.

It is a super-2 number, since 2×3123313231² = 19510171077879318722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123313241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33226690 + ... + 33226783.

It is an arithmetic number, because the mean of its divisors is an integer number (797441688).

Almost surely, 2^3123313231 is an apocalyptic number.

3123313231 is a deficient number, since it is larger than the sum of its proper divisors (66453521).

3123313231 is an equidigital number, since it uses as much as digits as its factorization.

3123313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66453520.

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

The square root of 3123313231 is about 55886.6104805078. The cubic root of 3123313231 is about 1461.7457741654.

Adding to 3123313231 its reverse (1323133213), we get a palindrome (4446446444).

The spelling of 3123313231 in words is "three billion, one hundred twenty-three million, three hundred thirteen thousand, two hundred thirty-one".