228517925 has 6 divisors (see below), whose sum is σ = 283362258. Its totient is φ = 182814320.

The previous prime is 228517909. The next prime is 228517931. The reversal of 228517925 is 529715822.

It can be written as a sum of positive squares in 3 ways, for example, as 417316 + 228100609 = 646^2 + 15103^2 .

It is not a de Polignac number, because 228517925 - 2⁴ = 228517909 is a prime.

It is a Duffinian number.

It is a congruent 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, 4570334 + ... + 4570383.

It is an arithmetic number, because the mean of its divisors is an integer number (47227043).

Almost surely, 2^228517925 is an apocalyptic number.

228517925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228517925 is a deficient number, since it is larger than the sum of its proper divisors (54844333).

228517925 is an equidigital number, since it uses as much as digits as its factorization.

228517925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9140727 (or 9140722 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 228517925 is about 15116.8093525056. The cubic root of 228517925 is about 611.3737069499.

The spelling of 228517925 in words is "two hundred twenty-eight million, five hundred seventeen thousand, nine hundred twenty-five".