428231 has 2 divisors, whose sum is σ = 428232. Its totient is φ = 428230.

The previous prime is 428227. The next prime is 428249. The reversal of 428231 is 132824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428231 - 2² = 428227 is a prime.

It is a super-2 number, since 2×428231² = 366763578722, 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 (428221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214115 + 214116.

It is an arithmetic number, because the mean of its divisors is an integer number (214116).

2⁴²⁸²³¹ is an apocalyptic number.

428231 is a deficient number, since it is larger than the sum of its proper divisors (1).

428231 is an equidigital number, since it uses as much as digits as its factorization.

428231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 428231 is about 654.3936124383. The cubic root of 428231 is about 75.3747759721.

It can be divided in two parts, 42823 and 1, that added together give a palindrome (42824).

The spelling of 428231 in words is "four hundred twenty-eight thousand, two hundred thirty-one".