225020261 has 2 divisors, whose sum is σ = 225020262. Its totient is φ = 225020260.

The previous prime is 225020219. The next prime is 225020269. The reversal of 225020261 is 162020522.

225020261 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., 136773025 + 88247236 = 11695^2 + 9394^2 .

It is a cyclic number.

It is not a de Polignac number, because 225020261 - 2⁶ = 225020197 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225020269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112510130 + 112510131.

It is an arithmetic number, because the mean of its divisors is an integer number (112510131).

Almost surely, 2^225020261 is an apocalyptic number.

It is an amenable number.

225020261 is a deficient number, since it is larger than the sum of its proper divisors (1).

225020261 is an equidigital number, since it uses as much as digits as its factorization.

225020261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 225020261 is about 15000.6753514633. The cubic root of 225020261 is about 608.2384555271.

Adding to 225020261 its reverse (162020522), we get a palindrome (387040783).

The spelling of 225020261 in words is "two hundred twenty-five million, twenty thousand, two hundred sixty-one".