228725279 has 8 divisors (see below), whose sum is σ = 232220880. Its totient is φ = 225239616.

The previous prime is 228725267. The next prime is 228725323. The reversal of 228725279 is 972527822.

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

It is a cyclic number.

It is not a de Polignac number, because 228725279 - 2²⁰ = 227676703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228725209) 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 7 ways as a sum of consecutive naturals, for example, 53192 + ... + 57330.

It is an arithmetic number, because the mean of its divisors is an integer number (29027610).

Almost surely, 2^228725279 is an apocalyptic number.

228725279 is a deficient number, since it is larger than the sum of its proper divisors (3495601).

228725279 is an equidigital number, since it uses as much as digits as its factorization.

228725279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4969.

The product of its digits is 282240, while the sum is 44.

The square root of 228725279 is about 15123.6661891223. Note that the first 3 decimals coincide. The cubic root of 228725279 is about 611.5585683922.

The spelling of 228725279 in words is "two hundred twenty-eight million, seven hundred twenty-five thousand, two hundred seventy-nine".