42218447 has 8 divisors (see below), whose sum is σ = 42621600. Its totient is φ = 41817600.

The previous prime is 42218441. The next prime is 42218459. The reversal of 42218447 is 74481224.

42218447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42218447 - 2⁶ = 42218383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42218441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69947 + ... + 70547.

It is an arithmetic number, because the mean of its divisors is an integer number (5327700).

Almost surely, 2^42218447 is an apocalyptic number.

42218447 is a deficient number, since it is larger than the sum of its proper divisors (403153).

42218447 is a wasteful number, since it uses less digits than its factorization.

42218447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153.

The product of its digits is 14336, while the sum is 32.

The square root of 42218447 is about 6497.5723928249. The cubic root of 42218447 is about 348.2042636412.

It can be divided in two parts, 4 and 2218447, that multiplied together give a palindrome (8873788).

The spelling of 42218447 in words is "forty-two million, two hundred eighteen thousand, four hundred forty-seven".