228507825 has 72 divisors (see below), whose sum is σ = 473386368. Its totient is φ = 96405120.

The previous prime is 228507823. The next prime is 228507827. The reversal of 228507825 is 528705822.

It is a happy number.

228507825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (228507823) and next prime (228507827).

It is not a de Polignac number, because 228507825 - 2¹ = 228507823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228507821) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 45384 + ... + 50166.

Almost surely, 2^228507825 is an apocalyptic number.

228507825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228507825 is an abundant number, since it is smaller than the sum of its proper divisors (244878543).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228507825 is a wasteful number, since it uses less digits than its factorization.

228507825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823 (or 4811 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 228507825 is about 15116.4752836103. The cubic root of 228507825 is about 611.3646996836.

The spelling of 228507825 in words is "two hundred twenty-eight million, five hundred seven thousand, eight hundred twenty-five".