42218056 has 8 divisors (see below), whose sum is σ = 79158870. Its totient is φ = 21109024.

The previous prime is 42217991. The next prime is 42218081. The reversal of 42218056 is 65081224.

It can be written as a sum of positive squares in only one way, i.e., 40068900 + 2149156 = 6330^2 + 1466^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2638621 + ... + 2638636.

Almost surely, 2^42218056 is an apocalyptic number.

It is an amenable number.

42218056 is a deficient number, since it is larger than the sum of its proper divisors (36940814).

42218056 is a wasteful number, since it uses less digits than its factorization.

42218056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5277263 (or 5277259 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 42218056 is about 6497.5423045949. The cubic root of 42218056 is about 348.2031886902.

The spelling of 42218056 in words is "forty-two million, two hundred eighteen thousand, fifty-six".