447240221 has 16 divisors (see below), whose sum is σ = 496160640. Its totient is φ = 401227200.

The previous prime is 447240217. The next prime is 447240223. The reversal of 447240221 is 122042744.

It is a cyclic number.

It is not a de Polignac number, because 447240221 - 2² = 447240217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447240223) 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 15 ways as a sum of consecutive naturals, for example, 39071 + ... + 49203.

It is an arithmetic number, because the mean of its divisors is an integer number (31010040).

Almost surely, 2^447240221 is an apocalyptic number.

It is an amenable number.

447240221 is a deficient number, since it is larger than the sum of its proper divisors (48920419).

447240221 is a wasteful number, since it uses less digits than its factorization.

447240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276.

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 447240221 is about 21148.0547805230. The cubic root of 447240221 is about 764.7396673521.

Adding to 447240221 its reverse (122042744), we get a palindrome (569282965).

The spelling of 447240221 in words is "four hundred forty-seven million, two hundred forty thousand, two hundred twenty-one".