445274213 has 8 divisors (see below), whose sum is σ = 447113880. Its totient is φ = 443439360.

The previous prime is 445274201. The next prime is 445274267. The reversal of 445274213 is 312472544.

It can be written as a sum of positive squares in 4 ways, for example, as 4190209 + 441084004 = 2047^2 + 21002^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 445274213 - 2⁸ = 445273957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 445274213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445274293) 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 7 ways as a sum of consecutive naturals, for example, 393833 + ... + 394961.

It is an arithmetic number, because the mean of its divisors is an integer number (55889235).

Almost surely, 2^445274213 is an apocalyptic number.

It is an amenable number.

445274213 is a deficient number, since it is larger than the sum of its proper divisors (1839667).

445274213 is a wasteful number, since it uses less digits than its factorization.

445274213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407.

The product of its digits is 26880, while the sum is 32.

The square root of 445274213 is about 21101.5215802084. The cubic root of 445274213 is about 763.6174570591.

The spelling of 445274213 in words is "four hundred forty-five million, two hundred seventy-four thousand, two hundred thirteen".