445656213 has 12 divisors (see below), whose sum is σ = 646539660. Its totient is φ = 295805376.

The previous prime is 445656203. The next prime is 445656251. The reversal of 445656213 is 312656544.

445656213 is a `hidden beast` number, since 44 + 56 + 562 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 280328049 + 165328164 = 16743^2 + 12858^2 .

It is not a de Polignac number, because 445656213 - 2⁹ = 445655701 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445656203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106056 + ... + 110177.

It is an arithmetic number, because the mean of its divisors is an integer number (53878305).

Almost surely, 2^445656213 is an apocalyptic number.

It is an amenable number.

445656213 is a deficient number, since it is larger than the sum of its proper divisors (200883447).

445656213 is a wasteful number, since it uses less digits than its factorization.

445656213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216468 (or 216465 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 445656213 is about 21110.5711197021. The cubic root of 445656213 is about 763.8357633544.

The spelling of 445656213 in words is "four hundred forty-five million, six hundred fifty-six thousand, two hundred thirteen".