228864533 has 4 divisors (see below), whose sum is σ = 234187008. Its totient is φ = 223542060.

The previous prime is 228864529. The next prime is 228864569. The reversal of 228864533 is 335468822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228864533 - 2² = 228864529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228864593) 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, 2661173 + ... + 2661258.

It is an arithmetic number, because the mean of its divisors is an integer number (58546752).

Almost surely, 2^228864533 is an apocalyptic number.

It is an amenable number.

228864533 is a deficient number, since it is larger than the sum of its proper divisors (5322475).

228864533 is an equidigital number, since it uses as much as digits as its factorization.

228864533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5322474.

The product of its digits is 276480, while the sum is 41.

The square root of 228864533 is about 15128.2693326104. The cubic root of 228864533 is about 611.6826542244.

The spelling of 228864533 in words is "two hundred twenty-eight million, eight hundred sixty-four thousand, five hundred thirty-three".