228131 has 2 divisors, whose sum is σ = 228132. Its totient is φ = 228130.

The previous prime is 228127. The next prime is 228139. The reversal of 228131 is 131822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228131 - 2² = 228127 is a prime.

It is a super-2 number, since 2×228131² = 104087506322, which contains 22 as substring.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 228131.

It is not a weakly prime, because it can be changed into another prime (228139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114065 + 114066.

It is an arithmetic number, because the mean of its divisors is an integer number (114066).

2²²⁸¹³¹ is an apocalyptic number.

228131 is a deficient number, since it is larger than the sum of its proper divisors (1).

228131 is an equidigital number, since it uses as much as digits as its factorization.

228131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 228131 is about 477.6306104093. The cubic root of 228131 is about 61.1028454079.

Adding to 228131 its reverse (131822), we get a palindrome (359953).

The spelling of 228131 in words is "two hundred twenty-eight thousand, one hundred thirty-one".