445040213 has 4 divisors (see below), whose sum is σ = 446624268. Its totient is φ = 443456160.

The previous prime is 445040147. The next prime is 445040221. The reversal of 445040213 is 312040544.

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

It can be written as a sum of positive squares in 2 ways, for example, as 355586449 + 89453764 = 18857^2 + 9458^2 .

It is a cyclic number.

It is not a de Polignac number, because 445040213 - 2²⁰ = 443991637 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 (445040243) 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, 791606 + ... + 792167.

It is an arithmetic number, because the mean of its divisors is an integer number (111656067).

Almost surely, 2^445040213 is an apocalyptic number.

It is an amenable number.

445040213 is a deficient number, since it is larger than the sum of its proper divisors (1584055).

445040213 is a wasteful number, since it uses less digits than its factorization.

445040213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584054.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 445040213 is about 21095.9762277075. The cubic root of 445040213 is about 763.4836684933.

Adding to 445040213 its reverse (312040544), we get a palindrome (757080757).

The spelling of 445040213 in words is "four hundred forty-five million, forty thousand, two hundred thirteen".