8405231 has 4 divisors (see below), whose sum is σ = 8416200. Its totient is φ = 8394264.

The previous prime is 8405227. The next prime is 8405233. The reversal of 8405231 is 1325048.

8405231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8405231 - 2² = 8405227 is a prime.

It is a super-3 number, since 3×8405231³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8405197 and 8405206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8405233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4241 + ... + 5898.

It is an arithmetic number, because the mean of its divisors is an integer number (2104050).

Almost surely, 2^8405231 is an apocalyptic number.

8405231 is a deficient number, since it is larger than the sum of its proper divisors (10969).

8405231 is a wasteful number, since it uses less digits than its factorization.

8405231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 8405231 is about 2899.1776420220. The cubic root of 8405231 is about 203.3214591889.

The spelling of 8405231 in words is "eight million, four hundred five thousand, two hundred thirty-one".