225289109 has 2 divisors, whose sum is σ = 225289110. Its totient is φ = 225289108.

The previous prime is 225289091. The next prime is 225289111. The reversal of 225289109 is 901982522.

Together with previous prime (225289091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204404209 + 20884900 = 14297^2 + 4570^2 .

It is a cyclic number.

It is not a de Polignac number, because 225289109 - 2²⁴ = 208511893 is a prime.

Together with 225289111, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_12397817 and since 225289109 and 12397817 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225283109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112644554 + 112644555.

It is an arithmetic number, because the mean of its divisors is an integer number (112644555).

Almost surely, 2^225289109 is an apocalyptic number.

It is an amenable number.

225289109 is a deficient number, since it is larger than the sum of its proper divisors (1).

225289109 is an equidigital number, since it uses as much as digits as its factorization.

225289109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 225289109 is about 15009.6338729497. The cubic root of 225289109 is about 608.4805946279.

The spelling of 225289109 in words is "two hundred twenty-five million, two hundred eighty-nine thousand, one hundred nine".