225344981 has 2 divisors, whose sum is σ = 225344982. Its totient is φ = 225344980.

The previous prime is 225344969. The next prime is 225345017. The reversal of 225344981 is 189443522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139948900 + 85396081 = 11830^2 + 9241^2 .

It is a cyclic number.

It is not a de Polignac number, because 225344981 - 2¹⁰ = 225343957 is a prime.

It is a super-2 number, since 2×225344981² = 101560720923780722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225344081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112672490 + 112672491.

It is an arithmetic number, because the mean of its divisors is an integer number (112672491).

Almost surely, 2^225344981 is an apocalyptic number.

It is an amenable number.

225344981 is a deficient number, since it is larger than the sum of its proper divisors (1).

225344981 is an equidigital number, since it uses as much as digits as its factorization.

225344981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 225344981 is about 15011.4949621948. The cubic root of 225344981 is about 608.5308918036.

The spelling of 225344981 in words is "two hundred twenty-five million, three hundred forty-four thousand, nine hundred eighty-one".