42224821 has 16 divisors (see below), whose sum is σ = 48591360. Its totient is φ = 36426240.

The previous prime is 42224797. The next prime is 42224857. The reversal of 42224821 is 12842224.

It is not a de Polignac number, because 42224821 - 2⁹ = 42224309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42224891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7905 + ... + 12121.

It is an arithmetic number, because the mean of its divisors is an integer number (3036960).

Almost surely, 2^42224821 is an apocalyptic number.

It is an amenable number.

42224821 is a deficient number, since it is larger than the sum of its proper divisors (6366539).

42224821 is a wasteful number, since it uses less digits than its factorization.

42224821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4284.

The product of its digits is 2048, while the sum is 25.

The square root of 42224821 is about 6498.0628651930. The cubic root of 42224821 is about 348.2217863313.

The spelling of 42224821 in words is "forty-two million, two hundred twenty-four thousand, eight hundred twenty-one".