228508163 has 4 divisors (see below), whose sum is σ = 246085728. Its totient is φ = 210930600.

The previous prime is 228508153. The next prime is 228508207. The reversal of 228508163 is 361805822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228508163 - 2²⁴ = 211730947 is a prime.

It is a super-3 number, since 3×228508163³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228508153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8788763 + ... + 8788788.

It is an arithmetic number, because the mean of its divisors is an integer number (61521432).

Almost surely, 2^228508163 is an apocalyptic number.

228508163 is a deficient number, since it is larger than the sum of its proper divisors (17577565).

228508163 is a wasteful number, since it uses less digits than its factorization.

228508163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17577564.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 228508163 is about 15116.4864634610. The cubic root of 228508163 is about 611.3650011192.

It can be divided in two parts, 22850 and 8163, that added together give a palindrome (31013).

The spelling of 228508163 in words is "two hundred twenty-eight million, five hundred eight thousand, one hundred sixty-three".