225405071 has 2 divisors, whose sum is σ = 225405072. Its totient is φ = 225405070.

The previous prime is 225405043. The next prime is 225405101. The reversal of 225405071 is 170504522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225405071 - 2⁶ = 225405007 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225405071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225405001) 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, 112702535 + 112702536.

It is an arithmetic number, because the mean of its divisors is an integer number (112702536).

Almost surely, 2^225405071 is an apocalyptic number.

225405071 is a deficient number, since it is larger than the sum of its proper divisors (1).

225405071 is an equidigital number, since it uses as much as digits as its factorization.

225405071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 225405071 is about 15013.4962950007. The cubic root of 225405071 is about 608.5849768356.

Adding to 225405071 its reverse (170504522), we get a palindrome (395909593).

The spelling of 225405071 in words is "two hundred twenty-five million, four hundred five thousand, seventy-one".