228400101 has 8 divisors (see below), whose sum is σ = 338370560. Its totient is φ = 152266716.

The previous prime is 228400093. The next prime is 228400103. The reversal of 228400101 is 101004822.

It is not a de Polignac number, because 228400101 - 2³ = 228400093 is a prime.

It is a super-2 number, since 2×228400101² = 104333212273620402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228400103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4229605 + ... + 4229658.

It is an arithmetic number, because the mean of its divisors is an integer number (42296320).

Almost surely, 2^228400101 is an apocalyptic number.

It is an amenable number.

228400101 is a deficient number, since it is larger than the sum of its proper divisors (109970459).

228400101 is an equidigital number, since it uses as much as digits as its factorization.

228400101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8459272 (or 8459266 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 228400101 is about 15112.9117313640. The cubic root of 228400101 is about 611.2686139839.

Adding to 228400101 its reverse (101004822), we get a palindrome (329404923).

The spelling of 228400101 in words is "two hundred twenty-eight million, four hundred thousand, one hundred one".