445227721 has 4 divisors (see below), whose sum is σ = 464585472. Its totient is φ = 425869972.

The previous prime is 445227707. The next prime is 445227737. The reversal of 445227721 is 127722544.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 445227721 - 2¹³ = 445219529 is a prime.

It is a pancake number, because a pancake can be divided into 445227721 parts by 29840 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445227781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9678841 + ... + 9678886.

It is an arithmetic number, because the mean of its divisors is an integer number (116146368).

Almost surely, 2^445227721 is an apocalyptic number.

It is an amenable number.

445227721 is a deficient number, since it is larger than the sum of its proper divisors (19357751).

445227721 is a wasteful number, since it uses less digits than its factorization.

445227721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19357750.

The product of its digits is 31360, while the sum is 34.

The square root of 445227721 is about 21100.4199247314. The cubic root of 445227721 is about 763.5908791756.

The spelling of 445227721 in words is "four hundred forty-five million, two hundred twenty-seven thousand, seven hundred twenty-one".