228472851 has 4 divisors (see below), whose sum is σ = 304630472. Its totient is φ = 152315232.

The previous prime is 228472847. The next prime is 228472897. The reversal of 228472851 is 158274822.

228472851 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 not a de Polignac number, because 228472851 - 2² = 228472847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228472841) 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, 38078806 + ... + 38078811.

It is an arithmetic number, because the mean of its divisors is an integer number (76157618).

Almost surely, 2^228472851 is an apocalyptic number.

228472851 is a deficient number, since it is larger than the sum of its proper divisors (76157621).

228472851 is an equidigital number, since it uses as much as digits as its factorization.

228472851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76157620.

The product of its digits is 71680, while the sum is 39.

The square root of 228472851 is about 15115.3184220512. The cubic root of 228472851 is about 611.3335075206. Note that the first 3 decimals are identical.

The spelling of 228472851 in words is "two hundred twenty-eight million, four hundred seventy-two thousand, eight hundred fifty-one".