228666523 has 4 divisors (see below), whose sum is σ = 228778488. Its totient is φ = 228554560.

The previous prime is 228666497. The next prime is 228666533. The reversal of 228666523 is 325666822.

228666523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228666523 - 2²⁵ = 195112091 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228666533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52861 + ... + 57022.

It is an arithmetic number, because the mean of its divisors is an integer number (57194622).

Almost surely, 2^228666523 is an apocalyptic number.

228666523 is a deficient number, since it is larger than the sum of its proper divisors (111965).

228666523 is a wasteful number, since it uses less digits than its factorization.

228666523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111964.

The product of its digits is 207360, while the sum is 40.

The square root of 228666523 is about 15121.7235459454. The cubic root of 228666523 is about 611.5061972497.

The spelling of 228666523 in words is "two hundred twenty-eight million, six hundred sixty-six thousand, five hundred twenty-three".