228320025 has 48 divisors (see below), whose sum is σ = 390510720. Its totient is φ = 117644800.

The previous prime is 228320023. The next prime is 228320039. The reversal of 228320025 is 520023822.

It is not a de Polignac number, because 228320025 - 2¹ = 228320023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228319977 and 228320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228320023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 281821 + ... + 282629.

It is an arithmetic number, because the mean of its divisors is an integer number (8135640).

Almost surely, 2^228320025 is an apocalyptic number.

228320025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228320025 is a deficient number, since it is larger than the sum of its proper divisors (162190695).

228320025 is a wasteful number, since it uses less digits than its factorization.

228320025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 228320025 is about 15110.2622412717. The cubic root of 228320025 is about 611.1971696680.

Adding to 228320025 its reverse (520023822), we get a palindrome (748343847).

The spelling of 228320025 in words is "two hundred twenty-eight million, three hundred twenty thousand, twenty-five".