42556422 has 16 divisors (see below), whose sum is σ = 85991472. Its totient is φ = 14039040.

The previous prime is 42556411. The next prime is 42556429. The reversal of 42556422 is 22465524.

It is a happy number.

It is a super-2 number, since 2×42556422² = 3622098106884168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42556422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42556429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35979 + ... + 37142.

It is an arithmetic number, because the mean of its divisors is an integer number (5374467).

Almost surely, 2^42556422 is an apocalyptic number.

42556422 is an abundant number, since it is smaller than the sum of its proper divisors (43435050).

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

42556422 is a wasteful number, since it uses less digits than its factorization.

42556422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73223.

The product of its digits is 19200, while the sum is 30.

The square root of 42556422 is about 6523.5283397867. The cubic root of 42556422 is about 349.1309650982.

The spelling of 42556422 in words is "forty-two million, five hundred fifty-six thousand, four hundred twenty-two".