445221843 has 8 divisors (see below), whose sum is σ = 647595456. Its totient is φ = 269831400.

The previous prime is 445221841. The next prime is 445221863. The reversal of 445221843 is 348122544.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 445221843 - 2¹ = 445221841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 13491571 = 445221843 / (4 + 4 + 5 + 2 + 2 + 1 + 8 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (445221841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6745753 + ... + 6745818.

It is an arithmetic number, because the mean of its divisors is an integer number (80949432).

Almost surely, 2^445221843 is an apocalyptic number.

445221843 is a deficient number, since it is larger than the sum of its proper divisors (202373613).

445221843 is a wasteful number, since it uses less digits than its factorization.

445221843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13491585.

The product of its digits is 30720, while the sum is 33.

The square root of 445221843 is about 21100.2806379441. The cubic root of 445221843 is about 763.5875187927.

The spelling of 445221843 in words is "four hundred forty-five million, two hundred twenty-one thousand, eight hundred forty-three".