42218004 has 24 divisors (see below), whose sum is σ = 104303808. Its totient is φ = 13244800.

The previous prime is 42217991. The next prime is 42218081. The reversal of 42218004 is 40081224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103272 + ... + 103679.

It is an arithmetic number, because the mean of its divisors is an integer number (4345992).

Almost surely, 2^42218004 is an apocalyptic number.

It is an amenable number.

42218004 is an abundant number, since it is smaller than the sum of its proper divisors (62085804).

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

42218004 is a wasteful number, since it uses less digits than its factorization.

42218004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206975 (or 206973 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 42218004 is about 6497.5383030806. The cubic root of 42218004 is about 348.2030457294.

Adding to 42218004 its reverse (40081224), we get a palindrome (82299228).

The spelling of 42218004 in words is "forty-two million, two hundred eighteen thousand, four".