225537217 has 2 divisors, whose sum is σ = 225537218. Its totient is φ = 225537216.

The previous prime is 225537211. The next prime is 225537233. The reversal of 225537217 is 712735522.

225537217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224280576 + 1256641 = 14976^2 + 1121^2 .

It is a cyclic number.

It is not a de Polignac number, because 225537217 - 2¹⁹ = 225012929 is a prime.

It is not a weakly prime, because it can be changed into another prime (225537211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112768608 + 112768609.

It is an arithmetic number, because the mean of its divisors is an integer number (112768609).

Almost surely, 2^225537217 is an apocalyptic number.

It is an amenable number.

225537217 is a deficient number, since it is larger than the sum of its proper divisors (1).

225537217 is an equidigital number, since it uses as much as digits as its factorization.

225537217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 34.

The square root of 225537217 is about 15017.8965571081. The cubic root of 225537217 is about 608.7038832989.

The spelling of 225537217 in words is "two hundred twenty-five million, five hundred thirty-seven thousand, two hundred seventeen".