228143825 has 72 divisors (see below), whose sum is σ = 370934592. Its totient is φ = 135521280.

The previous prime is 228143819. The next prime is 228143827. The reversal of 228143825 is 528341822.

228143825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 228143825 - 2⁴ = 228143809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (228143827) 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, 657302 + ... + 657648.

Almost surely, 2^228143825 is an apocalyptic number.

228143825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228143825 is a deficient number, since it is larger than the sum of its proper divisors (142790767).

228143825 is a wasteful number, since it uses less digits than its factorization.

228143825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 389 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 228143825 is about 15104.4306413714. The cubic root of 228143825 is about 611.0399040693.

The spelling of 228143825 in words is "two hundred twenty-eight million, one hundred forty-three thousand, eight hundred twenty-five".