228508161 has 16 divisors (see below), whose sum is σ = 359436288. Its totient is φ = 126363600.

The previous prime is 228508153. The next prime is 228508207. The reversal of 228508161 is 161805822.

It is not a de Polignac number, because 228508161 - 2³ = 228508153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228508061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174855 + ... + 176156.

It is an arithmetic number, because the mean of its divisors is an integer number (22464768).

Almost surely, 2^228508161 is an apocalyptic number.

228508161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

228508161 is a deficient number, since it is larger than the sum of its proper divisors (130928127).

228508161 is a wasteful number, since it uses less digits than its factorization.

228508161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351052.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 228508161 is about 15116.4863973081. The cubic root of 228508161 is about 611.3649993355.

The spelling of 228508161 in words is "two hundred twenty-eight million, five hundred eight thousand, one hundred sixty-one".