6431431 has 2 divisors, whose sum is σ = 6431432. Its totient is φ = 6431430.

The previous prime is 6431429. The next prime is 6431437. The reversal of 6431431 is 1341346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6431431 - 2¹ = 6431429 is a prime.

It is a super-2 number, since 2×6431431² = 82726609415522, which contains 22 as substring.

Together with 6431429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6431437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3215715 + 3215716.

It is an arithmetic number, because the mean of its divisors is an integer number (3215716).

Almost surely, 2^6431431 is an apocalyptic number.

6431431 is a deficient number, since it is larger than the sum of its proper divisors (1).

6431431 is an equidigital number, since it uses as much as digits as its factorization.

6431431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 6431431 is about 2536.0266165796. The cubic root of 6431431 is about 185.9669941820.

Adding to 6431431 its reverse (1341346), we get a palindrome (7772777).

The spelling of 6431431 in words is "six million, four hundred thirty-one thousand, four hundred thirty-one".