225042109 has 2 divisors, whose sum is σ = 225042110. Its totient is φ = 225042108.

The previous prime is 225042047. The next prime is 225042127. The reversal of 225042109 is 901240522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179479609 + 45562500 = 13397^2 + 6750^2 .

It is a cyclic number.

It is not a de Polignac number, because 225042109 - 2⁷ = 225041981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225042199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112521054 + 112521055.

It is an arithmetic number, because the mean of its divisors is an integer number (112521055).

Almost surely, 2^225042109 is an apocalyptic number.

It is an amenable number.

225042109 is a deficient number, since it is larger than the sum of its proper divisors (1).

225042109 is an equidigital number, since it uses as much as digits as its factorization.

225042109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 225042109 is about 15001.4035676666. The cubic root of 225042109 is about 608.2581402193.

The spelling of 225042109 in words is "two hundred twenty-five million, forty-two thousand, one hundred nine".