228665517 has 16 divisors (see below), whose sum is σ = 328409088. Its totient is φ = 141110640.

The previous prime is 228665509. The next prime is 228665539. The reversal of 228665517 is 715566822.

It is not a de Polignac number, because 228665517 - 2³ = 228665509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228665417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51313 + ... + 55590.

It is an arithmetic number, because the mean of its divisors is an integer number (20525568).

Almost surely, 2^228665517 is an apocalyptic number.

It is an amenable number.

228665517 is a deficient number, since it is larger than the sum of its proper divisors (99743571).

228665517 is a wasteful number, since it uses less digits than its factorization.

228665517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106960.

The product of its digits is 201600, while the sum is 42.

The square root of 228665517 is about 15121.6902825048. The cubic root of 228665517 is about 611.5053004909.

The spelling of 228665517 in words is "two hundred twenty-eight million, six hundred sixty-five thousand, five hundred seventeen".