228425 has 6 divisors (see below), whose sum is σ = 283278. Its totient is φ = 182720.

The previous prime is 228421. The next prime is 228427. The reversal of 228425 is 524822.

It can be written as a sum of positive squares in 3 ways, for example, as 1849 + 226576 = 43^2 + 476^2 .

It is not a de Polignac number, because 228425 - 2² = 228421 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 228425.

It is not an unprimeable number, because it can be changed into a prime (228421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4544 + ... + 4593.

It is an arithmetic number, because the mean of its divisors is an integer number (47213).

2²²⁸⁴²⁵ is an apocalyptic number.

228425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228425 is a deficient number, since it is larger than the sum of its proper divisors (54853).

228425 is an equidigital number, since it uses as much as digits as its factorization.

228425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9147 (or 9142 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 228425 is about 477.9382805342. The cubic root of 228425 is about 61.1290825626.

The spelling of 228425 in words is "two hundred twenty-eight thousand, four hundred twenty-five".