228085145 has 16 divisors (see below), whose sum is σ = 284418000. Its totient is φ = 175381248.

The previous prime is 228085127. The next prime is 228085147. The reversal of 228085145 is 541580822.

It is a happy number.

228085145 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 8 ways, for example, as 3924361 + 224160784 = 1981^2 + 14972^2 .

It is a cyclic number.

It is not a de Polignac number, because 228085145 - 2⁸ = 228084889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228085147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29771 + ... + 36639.

It is an arithmetic number, because the mean of its divisors is an integer number (17776125).

Almost surely, 2^228085145 is an apocalyptic number.

It is an amenable number.

228085145 is a deficient number, since it is larger than the sum of its proper divisors (56332855).

228085145 is a wasteful number, since it uses less digits than its factorization.

228085145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7132.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 228085145 is about 15102.4880400549. The cubic root of 228085145 is about 610.9875118322.

The spelling of 228085145 in words is "two hundred twenty-eight million, eighty-five thousand, one hundred forty-five".