228261 has 8 divisors (see below), whose sum is σ = 332064. Its totient is φ = 138320.

The previous prime is 228257. The next prime is 228281. The reversal of 228261 is 162822.

228261 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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 228261 - 2² = 228257 is a prime.

228261 is strictly pandigital in base 7.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3426 + ... + 3491.

It is an arithmetic number, because the mean of its divisors is an integer number (41508).

2²²⁸²⁶¹ is an apocalyptic number.

It is an amenable number.

228261 is a deficient number, since it is larger than the sum of its proper divisors (103803).

228261 is a wasteful number, since it uses less digits than its factorization.

228261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931.

The product of its digits is 384, while the sum is 21.

The square root of 228261 is about 477.7666794577. The cubic root of 228261 is about 61.1144496493.

The spelling of 228261 in words is "two hundred twenty-eight thousand, two hundred sixty-one".