225122581 has 2 divisors, whose sum is σ = 225122582. Its totient is φ = 225122580.

The previous prime is 225122549. The next prime is 225122617. The reversal of 225122581 is 185221522.

225122581 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., 189612900 + 35509681 = 13770^2 + 5959^2 .

It is a cyclic number.

It is not a de Polignac number, because 225122581 - 2⁵ = 225122549 is a prime.

It is a super-2 number, since 2×225122581² = 101360352952203122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225126581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112561290 + 112561291.

It is an arithmetic number, because the mean of its divisors is an integer number (112561291).

Almost surely, 2^225122581 is an apocalyptic number.

It is an amenable number.

225122581 is a deficient number, since it is larger than the sum of its proper divisors (1).

225122581 is an equidigital number, since it uses as much as digits as its factorization.

225122581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3200, while the sum is 28.

The square root of 225122581 is about 15004.0854769626. The cubic root of 225122581 is about 608.3306331942.

The spelling of 225122581 in words is "two hundred twenty-five million, one hundred twenty-two thousand, five hundred eighty-one".