42218465 has 8 divisors (see below), whose sum is σ = 50711208. Its totient is φ = 33742080.

The previous prime is 42218459. The next prime is 42218507. The reversal of 42218465 is 56481224.

It can be written as a sum of positive squares in 4 ways, for example, as 1373584 + 40844881 = 1172^2 + 6391^2 .

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

It is not a de Polignac number, because 42218465 - 2²⁰ = 41169889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 2585 + ... + 9545.

It is an arithmetic number, because the mean of its divisors is an integer number (6338901).

Almost surely, 2^42218465 is an apocalyptic number.

It is an amenable number.

42218465 is a deficient number, since it is larger than the sum of its proper divisors (8492743).

42218465 is a wasteful number, since it uses less digits than its factorization.

42218465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8179.

The product of its digits is 15360, while the sum is 32.

The square root of 42218465 is about 6497.5737779574. The cubic root of 42218465 is about 348.2043131273.

Adding to 42218465 its reverse (56481224), we get a palindrome (98699689).

The spelling of 42218465 in words is "forty-two million, two hundred eighteen thousand, four hundred sixty-five".