228144231 has 24 divisors (see below), whose sum is σ = 377022464. Its totient is φ = 130228560.

The previous prime is 228144173. The next prime is 228144281. The reversal of 228144231 is 132441822.

228144231 is a `hidden beast` number, since 228 + 14 + 423 + 1 = 666.

It is not a de Polignac number, because 228144231 - 2¹⁰ = 228143207 is a prime.

It is a super-2 number, since 2×228144231² = 104099580277162722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228144195 and 228144204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228144281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97566 + ... + 99876.

Almost surely, 2^228144231 is an apocalyptic number.

228144231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

228144231 is a deficient number, since it is larger than the sum of its proper divisors (148878233).

228144231 is a wasteful number, since it uses less digits than its factorization.

228144231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891 (or 3888 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 228144231 is about 15104.4440811306. Note that the first 3 decimals coincide. The cubic root of 228144231 is about 611.0402665337.

The spelling of 228144231 in words is "two hundred twenty-eight million, one hundred forty-four thousand, two hundred thirty-one".