228133847 has 4 divisors (see below), whose sum is σ = 228431280. Its totient is φ = 227836416.

The previous prime is 228133837. The next prime is 228133879. The reversal of 228133847 is 748331822.

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 228133847 - 2⁴ = 228133831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228133847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228133837) 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, 147563 + ... + 149100.

It is an arithmetic number, because the mean of its divisors is an integer number (57107820).

Almost surely, 2^228133847 is an apocalyptic number.

228133847 is a deficient number, since it is larger than the sum of its proper divisors (297433).

228133847 is an equidigital number, since it uses as much as digits as its factorization.

228133847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297432.

The product of its digits is 64512, while the sum is 38.

The square root of 228133847 is about 15104.1003373256. The cubic root of 228133847 is about 611.0309958802.

The spelling of 228133847 in words is "two hundred twenty-eight million, one hundred thirty-three thousand, eight hundred forty-seven".