445421313 has 12 divisors (see below), whose sum is σ = 677249040. Its totient is φ = 281318616.

The previous prime is 445421311. The next prime is 445421323. The reversal of 445421313 is 313124544.

It is a happy number.

445421313 is a `hidden beast` number, since 445 + 4 + 213 + 1 + 3 = 666.

It is not a de Polignac number, because 445421313 - 2¹ = 445421311 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (445421311) 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, 1302231 + ... + 1302572.

It is an arithmetic number, because the mean of its divisors is an integer number (56437420).

Almost surely, 2^445421313 is an apocalyptic number.

It is an amenable number.

445421313 is a deficient number, since it is larger than the sum of its proper divisors (231827727).

445421313 is a wasteful number, since it uses less digits than its factorization.

445421313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604828 (or 2604825 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 445421313 is about 21105.0068230266. The cubic root of 445421313 is about 763.7015369043.

Adding to 445421313 its reverse (313124544), we get a palindrome (758545857).

The spelling of 445421313 in words is "four hundred forty-five million, four hundred twenty-one thousand, three hundred thirteen".