228755021 has 8 divisors (see below), whose sum is σ = 250820064. Its totient is φ = 206901520.

The previous prime is 228754997. The next prime is 228755027. The reversal of 228755021 is 120557822.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228755021 - 2⁶ = 228754957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228755027) 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 7 ways as a sum of consecutive naturals, for example, 50615 + ... + 54948.

It is an arithmetic number, because the mean of its divisors is an integer number (31352508).

Almost surely, 2^228755021 is an apocalyptic number.

It is an amenable number.

228755021 is a deficient number, since it is larger than the sum of its proper divisors (22065043).

228755021 is a wasteful number, since it uses less digits than its factorization.

228755021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105771.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 228755021 is about 15124.6494504831. The cubic root of 228755021 is about 611.5850749895.

The spelling of 228755021 in words is "two hundred twenty-eight million, seven hundred fifty-five thousand, twenty-one".