445496221 has 4 divisors (see below), whose sum is σ = 454974912. Its totient is φ = 436017532.

The previous prime is 445496213. The next prime is 445496273. The reversal of 445496221 is 122694544.

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 445496221 - 2³ = 445496213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445496291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4739275 + ... + 4739368.

It is an arithmetic number, because the mean of its divisors is an integer number (113743728).

Almost surely, 2^445496221 is an apocalyptic number.

It is an amenable number.

445496221 is a deficient number, since it is larger than the sum of its proper divisors (9478691).

445496221 is an equidigital number, since it uses as much as digits as its factorization.

445496221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9478690.

The product of its digits is 69120, while the sum is 37.

The square root of 445496221 is about 21106.7813984037. The cubic root of 445496221 is about 763.7443459231.

The spelling of 445496221 in words is "four hundred forty-five million, four hundred ninety-six thousand, two hundred twenty-one".