3218431 has 2 divisors, whose sum is σ = 3218432. Its totient is φ = 3218430.

The previous prime is 3218417. The next prime is 3218437. The reversal of 3218431 is 1348123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3218431 - 2⁵ = 3218399 is a prime.

It is a super-2 number, since 2×3218431² = 20716596203522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3218437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609215 + 1609216.

It is an arithmetic number, because the mean of its divisors is an integer number (1609216).

Almost surely, 2^3218431 is an apocalyptic number.

3218431 is a deficient number, since it is larger than the sum of its proper divisors (1).

3218431 is an equidigital number, since it uses as much as digits as its factorization.

3218431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 3218431 is about 1793.9986064655. The cubic root of 3218431 is about 147.6436367724.

The spelling of 3218431 in words is "three million, two hundred eighteen thousand, four hundred thirty-one".