228020001 has 16 divisors (see below), whose sum is σ = 332246208. Its totient is φ = 137952000.

The previous prime is 228019993. The next prime is 228020003. The reversal of 228020001 is 100020822.

It is not a de Polignac number, because 228020001 - 2³ = 228019993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228020003) 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, 14085 + ... + 25581.

It is an arithmetic number, because the mean of its divisors is an integer number (20765388).

Almost surely, 2^228020001 is an apocalyptic number.

It is an amenable number.

228020001 is a deficient number, since it is larger than the sum of its proper divisors (104226207).

228020001 is a wasteful number, since it uses less digits than its factorization.

228020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12112.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 228020001 is about 15100.3311553091. The cubic root of 228020001 is about 610.9293377084.

Adding to 228020001 its reverse (100020822), we get a palindrome (328040823).

The spelling of 228020001 in words is "two hundred twenty-eight million, twenty thousand, one".