445212222 has 64 divisors (see below), whose sum is σ = 1099284480. Its totient is φ = 117057024.

The previous prime is 445212197. The next prime is 445212241. The reversal of 445212222 is 222212544.

It is a junction number, because it is equal to n+sod(n) for n = 445212192 and 445212201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208054 + ... + 210182.

It is an arithmetic number, because the mean of its divisors is an integer number (17176320).

Almost surely, 2^445212222 is an apocalyptic number.

445212222 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 445212222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549642240).

445212222 is an abundant number, since it is smaller than the sum of its proper divisors (654072258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445212222 is a wasteful number, since it uses less digits than its factorization.

445212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537.

The product of its digits is 2560, while the sum is 24.

The square root of 445212222 is about 21100.0526539627. The cubic root of 445212222 is about 763.5820185171.

Adding to 445212222 its reverse (222212544), we get a palindrome (667424766).

The spelling of 445212222 in words is "four hundred forty-five million, two hundred twelve thousand, two hundred twenty-two".