3181231 has 4 divisors (see below), whose sum is σ = 3258864. Its totient is φ = 3103600.

The previous prime is 3181229. The next prime is 3181237. The reversal of 3181231 is 1321813.

3181231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3181231 - 2¹ = 3181229 is a prime.

It is a super-2 number, since 2×3181231² = 20240461350722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3181199 and 3181208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3181237) 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 3 ways as a sum of consecutive naturals, for example, 38755 + ... + 38836.

It is an arithmetic number, because the mean of its divisors is an integer number (814716).

Almost surely, 2^3181231 is an apocalyptic number.

3181231 is a deficient number, since it is larger than the sum of its proper divisors (77633).

3181231 is an equidigital number, since it uses as much as digits as its factorization.

3181231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77632.

The product of its digits is 144, while the sum is 19.

The square root of 3181231 is about 1783.6005718770. The cubic root of 3181231 is about 147.0725882112.

The spelling of 3181231 in words is "three million, one hundred eighty-one thousand, two hundred thirty-one".