42228665 has 16 divisors (see below), whose sum is σ = 52793856. Its totient is φ = 32390400.

The previous prime is 42228587. The next prime is 42228679. The reversal of 42228665 is 56682224.

42228665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42228665 - 2¹² = 42224569 is a prime.

It is a Duffinian number.

Its product of digits (46080) is a multiple of the sum of its prime divisors (2560).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16310 + ... + 18720.

It is an arithmetic number, because the mean of its divisors is an integer number (3299616).

Almost surely, 2^42228665 is an apocalyptic number.

It is an amenable number.

42228665 is a deficient number, since it is larger than the sum of its proper divisors (10565191).

42228665 is a wasteful number, since it uses less digits than its factorization.

42228665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560.

The product of its digits is 46080, while the sum is 35.

The square root of 42228665 is about 6498.3586389180. The cubic root of 42228665 is about 348.2323529751.

The spelling of 42228665 in words is "forty-two million, two hundred twenty-eight thousand, six hundred sixty-five".