225205117 has 2 divisors, whose sum is σ = 225205118. Its totient is φ = 225205116.

The previous prime is 225205093. The next prime is 225205133. The reversal of 225205117 is 711502522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180929401 + 44275716 = 13451^2 + 6654^2 .

It is a cyclic number.

It is not a de Polignac number, because 225205117 - 2⁷ = 225204989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225205091 and 225205100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225205217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112602558 + 112602559.

It is an arithmetic number, because the mean of its divisors is an integer number (112602559).

Almost surely, 2^225205117 is an apocalyptic number.

It is an amenable number.

225205117 is a deficient number, since it is larger than the sum of its proper divisors (1).

225205117 is an equidigital number, since it uses as much as digits as its factorization.

225205117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 225205117 is about 15006.8356757846. The cubic root of 225205117 is about 608.4049675741.

Adding to 225205117 its reverse (711502522), we get a palindrome (936707639).

The spelling of 225205117 in words is "two hundred twenty-five million, two hundred five thousand, one hundred seventeen".