228365161 has 4 divisors (see below), whose sum is σ = 240384400. Its totient is φ = 216345924.

The previous prime is 228365153. The next prime is 228365167. The reversal of 228365161 is 161563822.

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 228365161 - 2³ = 228365153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228365167) 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, 6009591 + ... + 6009628.

It is an arithmetic number, because the mean of its divisors is an integer number (60096100).

Almost surely, 2^228365161 is an apocalyptic number.

It is an amenable number.

228365161 is a deficient number, since it is larger than the sum of its proper divisors (12019239).

228365161 is a wasteful number, since it uses less digits than its factorization.

228365161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12019238.

The product of its digits is 17280, while the sum is 34.

The square root of 228365161 is about 15111.7557219537. The cubic root of 228365161 is about 611.2374423478.

The spelling of 228365161 in words is "two hundred twenty-eight million, three hundred sixty-five thousand, one hundred sixty-one".