228813525 has 48 divisors (see below), whose sum is σ = 422294400. Its totient is φ = 121466880.

The previous prime is 228813517. The next prime is 228813551. The reversal of 228813525 is 525318822.

228813525 is a `hidden beast` number, since 228 + 81 + 352 + 5 = 666.

It is not a de Polignac number, because 228813525 - 2³ = 228813517 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 228813525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 172816 + ... + 174134.

It is an arithmetic number, because the mean of its divisors is an integer number (8797800).

Almost surely, 2^228813525 is an apocalyptic number.

228813525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228813525 is a deficient number, since it is larger than the sum of its proper divisors (193480875).

228813525 is a wasteful number, since it uses less digits than its factorization.

228813525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1584 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 228813525 is about 15126.5833881944. The cubic root of 228813525 is about 611.6372080869.

The spelling of 228813525 in words is "two hundred twenty-eight million, eight hundred thirteen thousand, five hundred twenty-five".