225130861 has 2 divisors, whose sum is σ = 225130862. Its totient is φ = 225130860.

The previous prime is 225130849. The next prime is 225130879. The reversal of 225130861 is 168031522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207532836 + 17598025 = 14406^2 + 4195^2 .

It is a cyclic number.

It is not a de Polignac number, because 225130861 - 2¹³ = 225122669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225130261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112565430 + 112565431.

It is an arithmetic number, because the mean of its divisors is an integer number (112565431).

Almost surely, 2^225130861 is an apocalyptic number.

It is an amenable number.

225130861 is a deficient number, since it is larger than the sum of its proper divisors (1).

225130861 is an equidigital number, since it uses as much as digits as its factorization.

225130861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 225130861 is about 15004.3613992732. The cubic root of 225130861 is about 608.3380912286.

The spelling of 225130861 in words is "two hundred twenty-five million, one hundred thirty thousand, eight hundred sixty-one".