228910025 has 12 divisors (see below), whose sum is σ = 284421900. Its totient is φ = 182758080.

The previous prime is 228910013. The next prime is 228910039. The reversal of 228910025 is 520019822.

It can be written as a sum of positive squares in 6 ways, for example, as 6661561 + 222248464 = 2581^2 + 14908^2 .

It is a de Polignac number, because none of the positive numbers 2^k-228910025 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228910025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3731 + ... + 21719.

It is an arithmetic number, because the mean of its divisors is an integer number (23701825).

Almost surely, 2^228910025 is an apocalyptic number.

228910025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228910025 is a deficient number, since it is larger than the sum of its proper divisors (55511875).

228910025 is a wasteful number, since it uses less digits than its factorization.

228910025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18508 (or 18503 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 228910025 is about 15129.7728006735. The cubic root of 228910025 is about 611.7231801247.

Adding to 228910025 its reverse (520019822), we get a palindrome (748929847).

The spelling of 228910025 in words is "two hundred twenty-eight million, nine hundred ten thousand, twenty-five".