42212212 has 24 divisors (see below), whose sum is σ = 85205120. Its totient is φ = 17923680.

The previous prime is 42212189. The next prime is 42212237. The reversal of 42212212 is 21221224.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3864 + ... + 9967.

Almost surely, 2^42212212 is an apocalyptic number.

It is an amenable number.

42212212 is an abundant number, since it is smaller than the sum of its proper divisors (42992908).

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

42212212 is a wasteful number, since it uses less digits than its factorization.

42212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13951 (or 13949 counting only the distinct ones).

The product of its digits is 128, while the sum is 16.

The square root of 42212212 is about 6497.0925805317. The cubic root of 42212212 is about 348.1871213679.

Adding to 42212212 its reverse (21221224), we get a palindrome (63433436).

It can be divided in two parts, 42212 and 212, that added together give a palindrome (42424).

The spelling of 42212212 in words is "forty-two million, two hundred twelve thousand, two hundred twelve".