228824521 has 2 divisors, whose sum is σ = 228824522. Its totient is φ = 228824520.

The previous prime is 228824507. The next prime is 228824579. The reversal of 228824521 is 125428822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135489600 + 93334921 = 11640^2 + 9661^2 .

It is a cyclic number.

It is not a de Polignac number, because 228824521 - 2⁹ = 228824009 is a prime.

It is a super-2 number, since 2×228824521² = 104721322821758882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (228824501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114412260 + 114412261.

It is an arithmetic number, because the mean of its divisors is an integer number (114412261).

Almost surely, 2^228824521 is an apocalyptic number.

It is an amenable number.

228824521 is a deficient number, since it is larger than the sum of its proper divisors (1).

228824521 is an equidigital number, since it uses as much as digits as its factorization.

228824521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20480, while the sum is 34.

The square root of 228824521 is about 15126.9468499099. The cubic root of 228824521 is about 611.6470056648.

The spelling of 228824521 in words is "two hundred twenty-eight million, eight hundred twenty-four thousand, five hundred twenty-one".