228455 has 4 divisors (see below), whose sum is σ = 274152. Its totient is φ = 182760.

The previous prime is 228451. The next prime is 228457. The reversal of 228455 is 554822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554822 = 2 ⋅277411.

It is not a de Polignac number, because 228455 - 2² = 228451 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 (228451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22841 + ... + 22850.

It is an arithmetic number, because the mean of its divisors is an integer number (68538).

2²²⁸⁴⁵⁵ is an apocalyptic number.

228455 is a deficient number, since it is larger than the sum of its proper divisors (45697).

228455 is an equidigital number, since it uses as much as digits as its factorization.

228455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45696.

The product of its digits is 3200, while the sum is 26.

The square root of 228455 is about 477.9696643094. The cubic root of 228455 is about 61.1317585572.

It can be divided in two parts, 228 and 455, that multiplied together give a triangular number (103740 = T₄₅₅).

The spelling of 228455 in words is "two hundred twenty-eight thousand, four hundred fifty-five".