228745161 has 32 divisors (see below), whose sum is σ = 359628800. Its totient is φ = 143292240.

The previous prime is 228745159. The next prime is 228745207. The reversal of 228745161 is 161547822.

It is not a de Polignac number, because 228745161 - 2¹ = 228745159 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228745151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63396 + ... + 66906.

It is an arithmetic number, because the mean of its divisors is an integer number (11238400).

Almost surely, 2^228745161 is an apocalyptic number.

It is an amenable number.

228745161 is a deficient number, since it is larger than the sum of its proper divisors (130883639).

228745161 is a wasteful number, since it uses less digits than its factorization.

228745161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666 (or 3660 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 228745161 is about 15124.3234890027. The cubic root of 228745161 is about 611.5762878374.

The spelling of 228745161 in words is "two hundred twenty-eight million, seven hundred forty-five thousand, one hundred sixty-one".