225500081 has 2 divisors, whose sum is σ = 225500082. Its totient is φ = 225500080.

The previous prime is 225500069. The next prime is 225500111. The reversal of 225500081 is 180005522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160149025 + 65351056 = 12655^2 + 8084^2 .

It is a cyclic number.

It is not a de Polignac number, because 225500081 - 2⁶ = 225500017 is a prime.

It is a super-2 number, since 2×225500081² = 101700573062013122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (225500021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112750040 + 112750041.

It is an arithmetic number, because the mean of its divisors is an integer number (112750041).

Almost surely, 2^225500081 is an apocalyptic number.

It is an amenable number.

225500081 is a deficient number, since it is larger than the sum of its proper divisors (1).

225500081 is an equidigital number, since it uses as much as digits as its factorization.

225500081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 225500081 is about 15016.6601146860. The cubic root of 225500081 is about 608.6704725999.

The spelling of 225500081 in words is "two hundred twenty-five million, five hundred thousand, eighty-one".