228681233 has 4 divisors (see below), whose sum is σ = 249470448. Its totient is φ = 207892020.

The previous prime is 228681223. The next prime is 228681289. The reversal of 228681233 is 332186822.

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 228681233 - 2¹⁶ = 228615697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 228681193 and 228681202.

It is not an unprimeable number, because it can be changed into a prime (228681223) 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, 10394591 + ... + 10394612.

It is an arithmetic number, because the mean of its divisors is an integer number (62367612).

Almost surely, 2^228681233 is an apocalyptic number.

It is an amenable number.

228681233 is a deficient number, since it is larger than the sum of its proper divisors (20789215).

228681233 is a wasteful number, since it uses less digits than its factorization.

228681233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20789214.

The product of its digits is 27648, while the sum is 35.

The square root of 228681233 is about 15122.2099244786. The cubic root of 228681233 is about 611.5193095951.

The spelling of 228681233 in words is "two hundred twenty-eight million, six hundred eighty-one thousand, two hundred thirty-three".