228331 has 2 divisors, whose sum is σ = 228332. Its totient is φ = 228330.

The previous prime is 228311. The next prime is 228337. The reversal of 228331 is 133822.

It is a happy number.

228331 is nontrivially palindromic in base 14.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228331 - 2⁵ = 228299 is a prime.

It is a super-2 number, since 2×228331² = 104270091122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228299 and 228308.

It is not a weakly prime, because it can be changed into another prime (228337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114165 + 114166.

It is an arithmetic number, because the mean of its divisors is an integer number (114166).

2²²⁸³³¹ is an apocalyptic number.

228331 is a deficient number, since it is larger than the sum of its proper divisors (1).

228331 is an equidigital number, since it uses as much as digits as its factorization.

228331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 228331 is about 477.8399313578. The cubic root of 228331 is about 61.1206962620.

The spelling of 228331 in words is "two hundred twenty-eight thousand, three hundred thirty-one".