42212266 has 16 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 20211840.

The previous prime is 42212237. The next prime is 42212267. The reversal of 42212266 is 66221224.

It is a self number, because there is not a number n which added to its sum of digits gives 42212266.

It is not an unprimeable number, because it can be changed into a prime (42212267) 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 7 ways as a sum of consecutive naturals, for example, 2505 + ... + 9523.

It is an arithmetic number, because the mean of its divisors is an integer number (4127760).

Almost surely, 2^42212266 is an apocalyptic number.

42212266 is a deficient number, since it is larger than the sum of its proper divisors (23831894).

42212266 is a wasteful number, since it uses less digits than its factorization.

42212266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7149.

The product of its digits is 2304, while the sum is 25.

The square root of 42212266 is about 6497.0967362353. The cubic root of 42212266 is about 348.1872698407.

The spelling of 42212266 in words is "forty-two million, two hundred twelve thousand, two hundred sixty-six".