228216473 has 4 divisors (see below), whose sum is σ = 228499380. Its totient is φ = 227933568.

The previous prime is 228216431. The next prime is 228216487. The reversal of 228216473 is 374612822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 118113424 + 110103049 = 10868^2 + 10493^2 .

It is a cyclic number.

It is not a de Polignac number, because 228216473 - 2⁸ = 228216217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228216403) 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, 140240 + ... + 141857.

It is an arithmetic number, because the mean of its divisors is an integer number (57124845).

Almost surely, 2^228216473 is an apocalyptic number.

It is an amenable number.

228216473 is a deficient number, since it is larger than the sum of its proper divisors (282907).

228216473 is an equidigital number, since it uses as much as digits as its factorization.

228216473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282906.

The product of its digits is 32256, while the sum is 35.

The square root of 228216473 is about 15106.8353072376. The cubic root of 228216473 is about 611.1047551430.

The spelling of 228216473 in words is "two hundred twenty-eight million, two hundred sixteen thousand, four hundred seventy-three".