225520073 has 2 divisors, whose sum is σ = 225520074. Its totient is φ = 225520072.

The previous prime is 225520039. The next prime is 225520081. The reversal of 225520073 is 370025522.

225520073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116359369 + 109160704 = 10787^2 + 10448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225520073 is a prime.

It is not a weakly prime, because it can be changed into another prime (225520093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112760036 + 112760037.

It is an arithmetic number, because the mean of its divisors is an integer number (112760037).

Almost surely, 2^225520073 is an apocalyptic number.

It is an amenable number.

225520073 is a deficient number, since it is larger than the sum of its proper divisors (1).

225520073 is an equidigital number, since it uses as much as digits as its factorization.

225520073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 225520073 is about 15017.3257606007. The cubic root of 225520073 is about 608.6884595565.

Adding to 225520073 its reverse (370025522), we get a palindrome (595545595).

The spelling of 225520073 in words is "two hundred twenty-five million, five hundred twenty thousand, seventy-three".