42218103 has 4 divisors (see below), whose sum is σ = 56290808. Its totient is φ = 28145400.

The previous prime is 42218083. The next prime is 42218149. The reversal of 42218103 is 30181224.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42218103 - 2¹⁰ = 42217079 is a prime.

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 42218103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42218903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7036348 + ... + 7036353.

It is an arithmetic number, because the mean of its divisors is an integer number (14072702).

Almost surely, 2^42218103 is an apocalyptic number.

42218103 is a deficient number, since it is larger than the sum of its proper divisors (14072705).

42218103 is a wasteful number, since it uses less digits than its factorization.

42218103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14072704.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 42218103 is about 6497.5459213460. The cubic root of 42218103 is about 348.2033179046.

Adding to 42218103 its reverse (30181224), we get a palindrome (72399327).

The spelling of 42218103 in words is "forty-two million, two hundred eighteen thousand, one hundred three".