42421222 has 16 divisors (see below), whose sum is σ = 68327712. Its totient is φ = 19680640.

The previous prime is 42421219. The next prime is 42421231. The reversal of 42421222 is 22212424.

It is a self number, because there is not a number n which added to its sum of digits gives 42421222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6373 + ... + 11200.

It is an arithmetic number, because the mean of its divisors is an integer number (4270482).

Almost surely, 2^42421222 is an apocalyptic number.

42421222 is a deficient number, since it is larger than the sum of its proper divisors (25906490).

42421222 is a wasteful number, since it uses less digits than its factorization.

42421222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17663.

The product of its digits is 512, while the sum is 19.

The square root of 42421222 is about 6513.1576059543. The cubic root of 42421222 is about 348.7608479730.

Adding to 42421222 its reverse (22212424), we get a palindrome (64633646).

The spelling of 42421222 in words is "forty-two million, four hundred twenty-one thousand, two hundred twenty-two".