228145025 has 6 divisors (see below), whose sum is σ = 282899862. Its totient is φ = 182516000.

The previous prime is 228145013. The next prime is 228145031. The reversal of 228145025 is 520541822.

228145025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1100401 + 227044624 = 1049^2 + 15068^2 .

It is not a de Polignac number, because 228145025 - 2²⁰ = 227096449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4562876 + ... + 4562925.

It is an arithmetic number, because the mean of its divisors is an integer number (47149977).

Almost surely, 2^228145025 is an apocalyptic number.

228145025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228145025 is a deficient number, since it is larger than the sum of its proper divisors (54754837).

228145025 is an equidigital number, since it uses as much as digits as its factorization.

228145025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9125811 (or 9125806 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 228145025 is about 15104.4703647629. The cubic root of 228145025 is about 611.0409753915.

Adding to 228145025 its reverse (520541822), we get a palindrome (748686847).

The spelling of 228145025 in words is "two hundred twenty-eight million, one hundred forty-five thousand, twenty-five".