445331 has 4 divisors (see below), whose sum is σ = 447552. Its totient is φ = 443112.

The previous prime is 445321. The next prime is 445339. The reversal of 445331 is 133544.

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 445331 - 2¹⁰ = 444307 is a prime.

It is a super-2 number, since 2×445331² = 396639399122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (111888).

2⁴⁴⁵³³¹ is an apocalyptic number.

445331 is a deficient number, since it is larger than the sum of its proper divisors (2221).

445331 is a wasteful number, since it uses less digits than its factorization.

445331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220.

The product of its digits is 720, while the sum is 20.

The square root of 445331 is about 667.3312520780. The cubic root of 445331 is about 76.3649917732.

Adding to 445331 its reverse (133544), we get a palindrome (578875).

The spelling of 445331 in words is "four hundred forty-five thousand, three hundred thirty-one".