450222581 has 2 divisors, whose sum is σ = 450222582. Its totient is φ = 450222580.

The previous prime is 450222551. The next prime is 450222601. The reversal of 450222581 is 185222054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401641681 + 48580900 = 20041^2 + 6970^2 .

It is a cyclic number.

It is not a de Polignac number, because 450222581 - 2²² = 446028277 is a prime.

It is a super-2 number, since 2×450222581² = 405400744884603122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450222511) 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, 225111290 + 225111291.

It is an arithmetic number, because the mean of its divisors is an integer number (225111291).

Almost surely, 2^450222581 is an apocalyptic number.

It is an amenable number.

450222581 is a deficient number, since it is larger than the sum of its proper divisors (1).

450222581 is an equidigital number, since it uses as much as digits as its factorization.

450222581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 450222581 is about 21218.4490715038. The cubic root of 450222581 is about 766.4357566939.

The spelling of 450222581 in words is "four hundred fifty million, two hundred twenty-two thousand, five hundred eighty-one".