445423131 has 48 divisors (see below), whose sum is σ = 693149184. Its totient is φ = 285604704.

The previous prime is 445423117. The next prime is 445423201. The reversal of 445423131 is 131324544.

It is a happy number.

It is not a de Polignac number, because 445423131 - 2⁶ = 445423067 is a prime.

It is a super-2 number, since 2×445423131² = 396803531259686322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 445423095 and 445423104.

It is not an unprimeable number, because it can be changed into a prime (445423831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 961806 + ... + 962268.

It is an arithmetic number, because the mean of its divisors is an integer number (14440608).

Almost surely, 2^445423131 is an apocalyptic number.

445423131 is a deficient number, since it is larger than the sum of its proper divisors (247726053).

445423131 is a wasteful number, since it uses less digits than its factorization.

445423131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 610 counting only the distinct ones).

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

The square root of 445423131 is about 21105.0498933312. The cubic root of 445423131 is about 763.7025759262.

Adding to 445423131 its reverse (131324544), we get a palindrome (576747675).

The spelling of 445423131 in words is "four hundred forty-five million, four hundred twenty-three thousand, one hundred thirty-one".