42218244 has 36 divisors (see below), whose sum is σ = 106959216. Its totient is φ = 14041008.

The previous prime is 42218243. The next prime is 42218257. The reversal of 42218244 is 44281224.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (42218243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19227 + ... + 21309.

Almost surely, 2^42218244 is an apocalyptic number.

It is an amenable number.

42218244 is an abundant number, since it is smaller than the sum of its proper divisors (64740972).

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

42218244 is a wasteful number, since it uses less digits than its factorization.

42218244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656 (or 2651 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 42218244 is about 6497.5567715873. The cubic root of 42218244 is about 348.2037055472.

Adding to 42218244 its reverse (44281224), we get a palindrome (86499468).

The spelling of 42218244 in words is "forty-two million, two hundred eighteen thousand, two hundred forty-four".