228084421 has 2 divisors, whose sum is σ = 228084422. Its totient is φ = 228084420.

The previous prime is 228084407. The next prime is 228084431. The reversal of 228084421 is 124480822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227587396 + 497025 = 15086^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 228084421 - 2⁹ = 228083909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228084401) 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, 114042210 + 114042211.

It is an arithmetic number, because the mean of its divisors is an integer number (114042211).

Almost surely, 2^228084421 is an apocalyptic number.

It is an amenable number.

228084421 is a deficient number, since it is larger than the sum of its proper divisors (1).

228084421 is an equidigital number, since it uses as much as digits as its factorization.

228084421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 228084421 is about 15102.4640704754. The cubic root of 228084421 is about 610.9868653552.

The spelling of 228084421 in words is "two hundred twenty-eight million, eighty-four thousand, four hundred twenty-one".