229228421 has 2 divisors, whose sum is σ = 229228422. Its totient is φ = 229228420.

The previous prime is 229228397. The next prime is 229228427. The reversal of 229228421 is 124822922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116337796 + 112890625 = 10786^2 + 10625^2 .

It is a cyclic number.

It is not a de Polignac number, because 229228421 - 2¹⁸ = 228966277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229228427) 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 as a sum of consecutive naturals, namely, 114614210 + 114614211.

It is an arithmetic number, because the mean of its divisors is an integer number (114614211).

Almost surely, 2^229228421 is an apocalyptic number.

It is an amenable number.

229228421 is a deficient number, since it is larger than the sum of its proper divisors (1).

229228421 is an equidigital number, since it uses as much as digits as its factorization.

229228421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 229228421 is about 15140.2913115964. The cubic root of 229228421 is about 612.0066684807.

The spelling of 229228421 in words is "two hundred twenty-nine million, two hundred twenty-eight thousand, four hundred twenty-one".