228528161 has 8 divisors (see below), whose sum is σ = 252491904. Its totient is φ = 205733440.

The previous prime is 228528151. The next prime is 228528163. The reversal of 228528161 is 161825822.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228528161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228528163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291845 + ... + 292626.

It is an arithmetic number, because the mean of its divisors is an integer number (31561488).

Almost surely, 2^228528161 is an apocalyptic number.

It is an amenable number.

228528161 is a deficient number, since it is larger than the sum of its proper divisors (23963743).

228528161 is a wasteful number, since it uses less digits than its factorization.

228528161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584511.

The product of its digits is 15360, while the sum is 35.

The square root of 228528161 is about 15117.1479122221. The cubic root of 228528161 is about 611.3828352314.

It can be divided in two parts, 22852 and 8161, that added together give a palindrome (31013).

The spelling of 228528161 in words is "two hundred twenty-eight million, five hundred twenty-eight thousand, one hundred sixty-one".