228207825 has 18 divisors (see below), whose sum is σ = 408745974. Its totient is φ = 121710720.

The previous prime is 228207809. The next prime is 228207851. The reversal of 228207825 is 528702822.

228207825 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 65415744 + 162792081 = 8088^2 + 12759^2 .

It is not a de Polignac number, because 228207825 - 2⁴ = 228207809 is a prime.

It is a super-2 number, since 2×228207825² = 104157622782461250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 228207825.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 506904 + ... + 507353.

Almost surely, 2^228207825 is an apocalyptic number.

228207825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228207825 is a deficient number, since it is larger than the sum of its proper divisors (180538149).

228207825 is a wasteful number, since it uses less digits than its factorization.

228207825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014273 (or 1014265 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 228207825 is about 15106.5490764767. The cubic root of 228207825 is about 611.0970360089.

The spelling of 228207825 in words is "two hundred twenty-eight million, two hundred seven thousand, eight hundred twenty-five".