445423231 has 16 divisors (see below), whose sum is σ = 492283008. Its totient is φ = 399652000.

The previous prime is 445423229. The next prime is 445423249. The reversal of 445423231 is 132324544.

It is a happy number.

It is not a de Polignac number, because 445423231 - 2¹ = 445423229 is a prime.

It is a super-2 number, since 2×445423231² = 396803709428958722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445423231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445423201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651816 + ... + 652498.

It is an arithmetic number, because the mean of its divisors is an integer number (30767688).

Almost surely, 2^445423231 is an apocalyptic number.

445423231 is a deficient number, since it is larger than the sum of its proper divisors (46859777).

445423231 is a wasteful number, since it uses less digits than its factorization.

445423231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382.

The product of its digits is 11520, while the sum is 28.

The square root of 445423231 is about 21105.0522624323. The cubic root of 445423231 is about 763.7026330781.

Adding to 445423231 its reverse (132324544), we get a palindrome (577747775).

The spelling of 445423231 in words is "four hundred forty-five million, four hundred twenty-three thousand, two hundred thirty-one".