228972173 has 4 divisors (see below), whose sum is σ = 241023360. Its totient is φ = 216920988.

The previous prime is 228972143. The next prime is 228972179. The reversal of 228972173 is 371279822.

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 228972173 - 2⁸ = 228971917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228972173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228972179) 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, 6025565 + ... + 6025602.

It is an arithmetic number, because the mean of its divisors is an integer number (60255840).

Almost surely, 2^228972173 is an apocalyptic number.

It is an amenable number.

228972173 is a deficient number, since it is larger than the sum of its proper divisors (12051187).

228972173 is a wasteful number, since it uses less digits than its factorization.

228972173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12051186.

The product of its digits is 84672, while the sum is 41.

The square root of 228972173 is about 15131.8264925289. The cubic root of 228972173 is about 611.7785351086.

The spelling of 228972173 in words is "two hundred twenty-eight million, nine hundred seventy-two thousand, one hundred seventy-three".