228128313 has 16 divisors (see below), whose sum is σ = 347904000. Its totient is φ = 130254096.

The previous prime is 228128311. The next prime is 228128317. The reversal of 228128313 is 313821822.

It is not a de Polignac number, because 228128313 - 2¹ = 228128311 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228128311) 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, 27856 + ... + 35102.

It is an arithmetic number, because the mean of its divisors is an integer number (21744000).

Almost surely, 2^228128313 is an apocalyptic number.

It is an amenable number.

228128313 is a deficient number, since it is larger than the sum of its proper divisors (119775687).

228128313 is a wasteful number, since it uses less digits than its factorization.

228128313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8756.

The product of its digits is 4608, while the sum is 30.

The square root of 228128313 is about 15103.9171409274. The cubic root of 228128313 is about 611.0260551068.

It can be divided in two parts, 22812 and 8313, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 228128313 in words is "two hundred twenty-eight million, one hundred twenty-eight thousand, three hundred thirteen".