228152173 has 4 divisors (see below), whose sum is σ = 228417408. Its totient is φ = 227886940.

The previous prime is 228152149. The next prime is 228152179. The reversal of 228152173 is 371251822.

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, and also an emirpimes, since its reverse is a distinct semiprime: 371251822 = 2 ⋅185625911.

It is a cyclic number.

It is not a de Polignac number, because 228152173 - 2²¹ = 226055021 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 (228152179) 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, 131323 + ... + 133048.

It is an arithmetic number, because the mean of its divisors is an integer number (57104352).

Almost surely, 2^228152173 is an apocalyptic number.

It is an amenable number.

228152173 is a deficient number, since it is larger than the sum of its proper divisors (265235).

228152173 is an equidigital number, since it uses as much as digits as its factorization.

228152173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265234.

The product of its digits is 6720, while the sum is 31.

The square root of 228152173 is about 15104.7069816001. The cubic root of 228152173 is about 611.0473568226.

The spelling of 228152173 in words is "two hundred twenty-eight million, one hundred fifty-two thousand, one hundred seventy-three".