3931231 has 2 divisors, whose sum is σ = 3931232. Its totient is φ = 3931230.

The previous prime is 3931177. The next prime is 3931241. The reversal of 3931231 is 1321393.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3931231 - 2¹¹ = 3929183 is a prime.

It is a super-2 number, since 2×3931231² = 30909154350722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3931241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965615 + 1965616.

It is an arithmetic number, because the mean of its divisors is an integer number (1965616).

Almost surely, 2^3931231 is an apocalyptic number.

3931231 is a deficient number, since it is larger than the sum of its proper divisors (1).

3931231 is an equidigital number, since it uses as much as digits as its factorization.

3931231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 22.

The square root of 3931231 is about 1982.7332145299. The cubic root of 3931231 is about 157.8251417053.

The spelling of 3931231 in words is "three million, nine hundred thirty-one thousand, two hundred thirty-one".