42375218 has 6 divisors (see below), whose sum is σ = 63576639. Its totient is φ = 21183006.

The previous prime is 42375217. The next prime is 42375227. The reversal of 42375218 is 81257324.

It can be written as a sum of positive squares in only one way, i.e., 21187609 + 21187609 = 4603^2 + 4603^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=4603.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42375211) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6905 + ... + 11507.

Almost surely, 2^42375218 is an apocalyptic number.

42375218 is a deficient number, since it is larger than the sum of its proper divisors (21201421).

42375218 is an frugal number, since it uses more digits than its factorization.

42375218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9208 (or 4605 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 42375218 is about 6509.6250276034. The cubic root of 42375218 is about 348.6347303004.

Multiplying 42375218 by its sum of digits (32), we get a square (1356006976 = 36824²).

The spelling of 42375218 in words is "forty-two million, three hundred seventy-five thousand, two hundred eighteen".