445325581 has 2 divisors, whose sum is σ = 445325582. Its totient is φ = 445325580.

The previous prime is 445325567. The next prime is 445325669. The reversal of 445325581 is 185523544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443102500 + 2223081 = 21050^2 + 1491^2 .

It is a cyclic number.

It is not a de Polignac number, because 445325581 - 2⁵ = 445325549 is a prime.

It is a super-2 number, since 2×445325581² = 396629746185975122, 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 445325581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445325521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222662790 + 222662791.

It is an arithmetic number, because the mean of its divisors is an integer number (222662791).

Almost surely, 2^445325581 is an apocalyptic number.

It is an amenable number.

445325581 is a deficient number, since it is larger than the sum of its proper divisors (1).

445325581 is an equidigital number, since it uses as much as digits as its factorization.

445325581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96000, while the sum is 37.

The square root of 445325581 is about 21102.7387085184. The cubic root of 445325581 is about 763.6468202336.

The spelling of 445325581 in words is "four hundred forty-five million, three hundred twenty-five thousand, five hundred eighty-one".