445220011 has 4 divisors (see below), whose sum is σ = 445915224. Its totient is φ = 444524800.

The previous prime is 445219991. The next prime is 445220033. The reversal of 445220011 is 110022544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 445220011 - 2²¹ = 443122859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445220071) 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, 346645 + ... + 347926.

It is an arithmetic number, because the mean of its divisors is an integer number (111478806).

Almost surely, 2^445220011 is an apocalyptic number.

445220011 is a deficient number, since it is larger than the sum of its proper divisors (695213).

445220011 is an equidigital number, since it uses as much as digits as its factorization.

445220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695212.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 445220011 is about 21100.2372261546. The cubic root of 445220011 is about 763.5864714539.

Adding to 445220011 its reverse (110022544), we get a palindrome (555242555).

The spelling of 445220011 in words is "four hundred forty-five million, two hundred twenty thousand, eleven".