228971 has 4 divisors (see below), whose sum is σ = 229944. Its totient is φ = 228000.

The previous prime is 228961. The next prime is 228983. The reversal of 228971 is 179822.

It is a happy number.

228971 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 228971 - 2¹⁰ = 227947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (57486).

2²²⁸⁹⁷¹ is an apocalyptic number.

228971 is a deficient number, since it is larger than the sum of its proper divisors (973).

228971 is an equidigital number, since it uses as much as digits as its factorization.

228971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972.

The product of its digits is 2016, while the sum is 29.

The square root of 228971 is about 478.5091430683. The cubic root of 228971 is about 61.1777490415.

The spelling of 228971 in words is "two hundred twenty-eight thousand, nine hundred seventy-one".