228129 has 16 divisors (see below), whose sum is σ = 344064. Its totient is φ = 133200.

The previous prime is 228127. The next prime is 228131. The reversal of 228129 is 921822.

It is an interprime number because it is at equal distance from previous prime (228127) and next prime (228131).

It is not a de Polignac number, because 228129 - 2¹ = 228127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228099 and 228108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228127) 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, 912 + ... + 1134.

It is an arithmetic number, because the mean of its divisors is an integer number (21504).

2²²⁸¹²⁹ is an apocalyptic number.

It is an amenable number.

228129 is a deficient number, since it is larger than the sum of its proper divisors (115935).

228129 is a wasteful number, since it uses less digits than its factorization.

228129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268.

The product of its digits is 576, while the sum is 24.

The square root of 228129 is about 477.6285167366. The cubic root of 228129 is about 61.1026668467.

The spelling of 228129 in words is "two hundred twenty-eight thousand, one hundred twenty-nine".