225430129 has 2 divisors, whose sum is σ = 225430130. Its totient is φ = 225430128.

The previous prime is 225430111. The next prime is 225430169. The reversal of 225430129 is 921034522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 85599504 = 11825^2 + 9252^2 .

It is a cyclic number.

It is not a de Polignac number, because 225430129 - 2⁵ = 225430097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225430097 and 225430106.

It is not a weakly prime, because it can be changed into another prime (225430169) 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, 112715064 + 112715065.

It is an arithmetic number, because the mean of its divisors is an integer number (112715065).

Almost surely, 2^225430129 is an apocalyptic number.

It is an amenable number.

225430129 is a deficient number, since it is larger than the sum of its proper divisors (1).

225430129 is an equidigital number, since it uses as much as digits as its factorization.

225430129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 225430129 is about 15014.3307876175. The cubic root of 225430129 is about 608.6075278770.

The spelling of 225430129 in words is "two hundred twenty-five million, four hundred thirty thousand, one hundred twenty-nine".