228523 has 2 divisors, whose sum is σ = 228524. Its totient is φ = 228522.

The previous prime is 228521. The next prime is 228539. The reversal of 228523 is 325822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228523 - 2¹ = 228521 is a prime.

Together with 228521, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 228494 and 228503.

It is not a weakly prime, because it can be changed into another prime (228521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114261 + 114262.

It is an arithmetic number, because the mean of its divisors is an integer number (114262).

2²²⁸⁵²³ is an apocalyptic number.

228523 is a deficient number, since it is larger than the sum of its proper divisors (1).

228523 is an equidigital number, since it uses as much as digits as its factorization.

228523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 22.

The square root of 228523 is about 478.0407932384. The cubic root of 228523 is about 61.1378232778.

The spelling of 228523 in words is "two hundred twenty-eight thousand, five hundred twenty-three".