228100823 has 6 divisors (see below), whose sum is σ = 233059824. Its totient is φ = 223146276.

The previous prime is 228100811. The next prime is 228100841. The reversal of 228100823 is 328001822.

It is not a de Polignac number, because 228100823 - 2²² = 223906519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228100792 and 228100801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228103823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102440 + ... + 104642.

It is an arithmetic number, because the mean of its divisors is an integer number (38843304).

Almost surely, 2^228100823 is an apocalyptic number.

228100823 is a deficient number, since it is larger than the sum of its proper divisors (4959001).

228100823 is an frugal number, since it uses more digits than its factorization.

228100823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453 (or 2250 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 228100823 is about 15103.0070846835. The cubic root of 228100823 is about 611.0015107605.

Subtracting 228100823 from its reverse (328001822), we obtain a palindrome (99900999).

The spelling of 228100823 in words is "two hundred twenty-eight million, one hundred thousand, eight hundred twenty-three".