228123871 has 4 divisors (see below), whose sum is σ = 229147072. Its totient is φ = 227100672.

The previous prime is 228123869. The next prime is 228123887. The reversal of 228123871 is 178321822.

228123871 = 481² + 482² + ... + 926².

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

It is a 11-Lehmer number, since φ(228123871) divides (228123871-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 228123871 - 2¹ = 228123869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228123851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511266 + ... + 511711.

It is an arithmetic number, because the mean of its divisors is an integer number (57286768).

Almost surely, 2^228123871 is an apocalyptic number.

228123871 is a deficient number, since it is larger than the sum of its proper divisors (1023201).

228123871 is a wasteful number, since it uses less digits than its factorization.

228123871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023200.

The product of its digits is 10752, while the sum is 34.

The square root of 228123871 is about 15103.7700922650. The cubic root of 228123871 is about 611.0220892169.

The spelling of 228123871 in words is "two hundred twenty-eight million, one hundred twenty-three thousand, eight hundred seventy-one".