6431231 has 4 divisors (see below), whose sum is σ = 6447000. Its totient is φ = 6415464.

The previous prime is 6431221. The next prime is 6431233. The reversal of 6431231 is 1321346.

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 6431231 - 2¹⁴ = 6414847 is a prime.

It is a super-2 number, since 2×6431231² = 82721464350722, 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 (6431233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7256 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (1611750).

Almost surely, 2^6431231 is an apocalyptic number.

6431231 is a deficient number, since it is larger than the sum of its proper divisors (15769).

6431231 is a wasteful number, since it uses less digits than its factorization.

6431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15768.

The product of its digits is 432, while the sum is 20.

The square root of 6431231 is about 2535.9871845102. The cubic root of 6431231 is about 185.9650664729.

Adding to 6431231 its reverse (1321346), we get a palindrome (7752577).

The spelling of 6431231 in words is "six million, four hundred thirty-one thousand, two hundred thirty-one".