225950581 has 2 divisors, whose sum is σ = 225950582. Its totient is φ = 225950580.

The previous prime is 225950563. The next prime is 225950609. The reversal of 225950581 is 185059522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217828081 + 8122500 = 14759^2 + 2850^2 .

It is a cyclic number.

It is not a de Polignac number, because 225950581 - 2¹⁷ = 225819509 is a prime.

It is a super-2 number, since 2×225950581² = 102107330108475122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225950581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225950531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112975290 + 112975291.

It is an arithmetic number, because the mean of its divisors is an integer number (112975291).

Almost surely, 2^225950581 is an apocalyptic number.

It is an amenable number.

225950581 is a deficient number, since it is larger than the sum of its proper divisors (1).

225950581 is an equidigital number, since it uses as much as digits as its factorization.

225950581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 225950581 is about 15031.6526370190. The cubic root of 225950581 is about 609.0755332807.

The spelling of 225950581 in words is "two hundred twenty-five million, nine hundred fifty thousand, five hundred eighty-one".