445332215 has 4 divisors (see below), whose sum is σ = 534398664. Its totient is φ = 356265768.

The previous prime is 445332197. The next prime is 445332247. The reversal of 445332215 is 512233544.

It is a happy number.

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 445332215 - 2⁸ = 445331959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44533217 + ... + 44533226.

It is an arithmetic number, because the mean of its divisors is an integer number (133599666).

Almost surely, 2^445332215 is an apocalyptic number.

445332215 is a deficient number, since it is larger than the sum of its proper divisors (89066449).

445332215 is an equidigital number, since it uses as much as digits as its factorization.

445332215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89066448.

The product of its digits is 14400, while the sum is 29.

The square root of 445332215 is about 21102.8958913226. The cubic root of 445332215 is about 763.6506122217.

Adding to 445332215 its reverse (512233544), we get a palindrome (957565759).

The spelling of 445332215 in words is "four hundred forty-five million, three hundred thirty-two thousand, two hundred fifteen".