42821222 has 4 divisors (see below), whose sum is σ = 64231836. Its totient is φ = 21410610.

The previous prime is 42821221. The next prime is 42821227. The reversal of 42821222 is 22212824.

42821222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42821221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705304 + ... + 10705307.

It is an arithmetic number, because the mean of its divisors is an integer number (16057959).

Almost surely, 2^42821222 is an apocalyptic number.

42821222 is a deficient number, since it is larger than the sum of its proper divisors (21410614).

42821222 is a wasteful number, since it uses less digits than its factorization.

42821222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21410613.

The product of its digits is 1024, while the sum is 23.

The square root of 42821222 is about 6543.7926311887. The cubic root of 42821222 is about 349.8536040810.

The spelling of 42821222 in words is "forty-two million, eight hundred twenty-one thousand, two hundred twenty-two".