228717523 has 4 divisors (see below), whose sum is σ = 228802320. Its totient is φ = 228632728.

The previous prime is 228717521. The next prime is 228717583. The reversal of 228717523 is 325717822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325717822 = 2 ⋅162858911.

It is a cyclic number.

It is not a de Polignac number, because 228717523 - 2¹ = 228717521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228717521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38215 + ... + 43792.

It is an arithmetic number, because the mean of its divisors is an integer number (57200580).

Almost surely, 2^228717523 is an apocalyptic number.

228717523 is a deficient number, since it is larger than the sum of its proper divisors (84797).

228717523 is an equidigital number, since it uses as much as digits as its factorization.

228717523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84796.

The product of its digits is 47040, while the sum is 37.

The square root of 228717523 is about 15123.4097676417. The cubic root of 228717523 is about 611.5516557298.

The spelling of 228717523 in words is "two hundred twenty-eight million, seven hundred seventeen thousand, five hundred twenty-three".