42221238 has 32 divisors (see below), whose sum is σ = 88701696. Its totient is φ = 13372128.

The previous prime is 42221219. The next prime is 42221239. The reversal of 42221238 is 83212224.

42221238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221239) by changing a digit.

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, 21556 + ... + 23432.

It is an arithmetic number, because the mean of its divisors is an integer number (2771928).

Almost surely, 2^42221238 is an apocalyptic number.

42221238 is an abundant number, since it is smaller than the sum of its proper divisors (46480458).

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

42221238 is a wasteful number, since it uses less digits than its factorization.

42221238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068.

The product of its digits is 1536, while the sum is 24.

The square root of 42221238 is about 6497.7871617959. The cubic root of 42221238 is about 348.2119365642.

It can be divided in two parts, 4222 and 1238, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 42221238 in words is "forty-two million, two hundred twenty-one thousand, two hundred thirty-eight".