228947161 has 3 divisors (see below), whose sum is σ = 228962293. Its totient is φ = 228932030.

The previous prime is 228947149. The next prime is 228947171. The reversal of 228947161 is 161749822.

The square root of 228947161 is 15131.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 228947161 - 2¹⁷ = 228816089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228947171) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7566 + ... + 22696.

Almost surely, 2^228947161 is an apocalyptic number.

228947161 is the 15131-st square number.

228947161 is the 7566-th centered octagonal number.

It is an amenable number.

228947161 is a deficient number, since it is larger than the sum of its proper divisors (15132).

228947161 is an frugal number, since it uses more digits than its factorization.

228947161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30262 (or 15131 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The cubic root of 228947161 is about 611.7562582212.

The spelling of 228947161 in words is "two hundred twenty-eight million, nine hundred forty-seven thousand, one hundred sixty-one".