42212166 has 32 divisors (see below), whose sum is σ = 86145120. Its totient is φ = 13787136.

The previous prime is 42212143. The next prime is 42212171. The reversal of 42212166 is 66121224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72870 + ... + 73446.

It is an arithmetic number, because the mean of its divisors is an integer number (2692035).

Almost surely, 2^42212166 is an apocalyptic number.

42212166 is an abundant number, since it is smaller than the sum of its proper divisors (43932954).

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

42212166 is a wasteful number, since it uses less digits than its factorization.

42212166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808.

The product of its digits is 1152, while the sum is 24.

The square root of 42212166 is about 6497.0890404857. The cubic root of 42212166 is about 348.1869948909.

The spelling of 42212166 in words is "forty-two million, two hundred twelve thousand, one hundred sixty-six".