228876521 has 2 divisors, whose sum is σ = 228876522. Its totient is φ = 228876520.

The previous prime is 228876463. The next prime is 228876541. The reversal of 228876521 is 125678822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209207296 + 19669225 = 14464^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 228876521 - 2¹⁰ = 228875497 is a prime.

It is not a weakly prime, because it can be changed into another prime (228876541) 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 as a sum of consecutive naturals, namely, 114438260 + 114438261.

It is an arithmetic number, because the mean of its divisors is an integer number (114438261).

Almost surely, 2^228876521 is an apocalyptic number.

It is an amenable number.

228876521 is a deficient number, since it is larger than the sum of its proper divisors (1).

228876521 is an equidigital number, since it uses as much as digits as its factorization.

228876521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 41.

The square root of 228876521 is about 15128.6655392999. The cubic root of 228876521 is about 611.6933340845.

The spelling of 228876521 in words is "two hundred twenty-eight million, eight hundred seventy-six thousand, five hundred twenty-one".