42218351 has 6 divisors (see below), whose sum is σ = 49111200. Its totient is φ = 36187116.

The previous prime is 42218347. The next prime is 42218353. The reversal of 42218351 is 15381224.

42218351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42218351 - 2² = 42218347 is a prime.

It is a super-2 number, since 2×42218351² = 3564778322318402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42218351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42218353) 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 5 ways as a sum of consecutive naturals, for example, 430751 + ... + 430848.

It is an arithmetic number, because the mean of its divisors is an integer number (8185200).

Almost surely, 2^42218351 is an apocalyptic number.

42218351 is a deficient number, since it is larger than the sum of its proper divisors (6892849).

42218351 is an equidigital number, since it uses as much as digits as its factorization.

42218351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861613 (or 861606 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 42218351 is about 6497.5650054463. The cubic root of 42218351 is about 348.2039997152.

Adding to 42218351 its reverse (15381224), we get a palindrome (57599575).

The spelling of 42218351 in words is "forty-two million, two hundred eighteen thousand, three hundred fifty-one".