42156222 has 16 divisors (see below), whose sum is σ = 84376080. Its totient is φ = 14041472.

The previous prime is 42156173. The next prime is 42156223. The reversal of 42156222 is 22265124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42156192 and 42156201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42156223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14308 + ... + 17000.

It is an arithmetic number, because the mean of its divisors is an integer number (5273505).

Almost surely, 2^42156222 is an apocalyptic number.

42156222 is an abundant number, since it is smaller than the sum of its proper divisors (42219858).

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

42156222 is a wasteful number, since it uses less digits than its factorization.

42156222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5307.

The product of its digits is 1920, while the sum is 24.

The square root of 42156222 is about 6492.7823003702. The cubic root of 42156222 is about 348.0331088858.

The spelling of 42156222 in words is "forty-two million, one hundred fifty-six thousand, two hundred twenty-two".