42218001 has 24 divisors (see below), whose sum is σ = 71944704. Its totient is φ = 23345280.

The previous prime is 42217991. The next prime is 42218081. The reversal of 42218001 is 10081224.

It is not a de Polignac number, because 42218001 - 2⁶ = 42217937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42218081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8856 + ... + 12761.

It is an arithmetic number, because the mean of its divisors is an integer number (2997696).

Almost surely, 2^42218001 is an apocalyptic number.

It is an amenable number.

42218001 is a deficient number, since it is larger than the sum of its proper divisors (29726703).

42218001 is a wasteful number, since it uses less digits than its factorization.

42218001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21661 (or 21658 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 42218001 is about 6497.5380722240. The cubic root of 42218001 is about 348.2030374817.

Adding to 42218001 its reverse (10081224), we get a palindrome (52299225).

The spelling of 42218001 in words is "forty-two million, two hundred eighteen thousand, one".