6403231 has 4 divisors (see below), whose sum is σ = 6508264. Its totient is φ = 6298200.

The previous prime is 6403219. The next prime is 6403273. The reversal of 6403231 is 1323046.

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 6403231 - 2⁹ = 6402719 is a prime.

It is a super-2 number, since 2×6403231² = 82002734478722, 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 = 6403199 and 6403208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403031) 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, 52425 + ... + 52546.

It is an arithmetic number, because the mean of its divisors is an integer number (1627066).

Almost surely, 2^6403231 is an apocalyptic number.

6403231 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6403231 is a deficient number, since it is larger than the sum of its proper divisors (105033).

6403231 is a wasteful number, since it uses less digits than its factorization.

6403231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105032.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 6403231 is about 2530.4606300040. The cubic root of 6403231 is about 185.6947917831.

Adding to 6403231 its reverse (1323046), we get a palindrome (7726277).

The spelling of 6403231 in words is "six million, four hundred three thousand, two hundred thirty-one".