442212305 has 8 divisors (see below), whose sum is σ = 531461544. Its totient is φ = 353232000.

The previous prime is 442212293. The next prime is 442212307. The reversal of 442212305 is 503212244.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 230189584 + 212022721 = 15172^2 + 14561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 442212305 - 2¹⁴ = 442195921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442212307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63596 + ... + 70205.

It is an arithmetic number, because the mean of its divisors is an integer number (66432693).

Almost surely, 2^442212305 is an apocalyptic number.

It is an amenable number.

442212305 is a deficient number, since it is larger than the sum of its proper divisors (89249239).

442212305 is a wasteful number, since it uses less digits than its factorization.

442212305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134467.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 442212305 is about 21028.8445949843. The cubic root of 442212305 is about 761.8631026704.

Adding to 442212305 its reverse (503212244), we get a palindrome (945424549).

The spelling of 442212305 in words is "four hundred forty-two million, two hundred twelve thousand, three hundred five".