42221568 has 60 divisors (see below), whose sum is σ = 112718480. Its totient is φ = 14057472.

The previous prime is 42221561. The next prime is 42221579. The reversal of 42221568 is 86512224.

It is not an unprimeable number, because it can be changed into a prime (42221561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48723 + ... + 49581.

Almost surely, 2^42221568 is an apocalyptic number.

42221568 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42221568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56359240).

42221568 is an abundant number, since it is smaller than the sum of its proper divisors (70496912).

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

42221568 is an frugal number, since it uses more digits than its factorization.

42221568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 864 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 42221568 is about 6497.8125550065. The cubic root of 42221568 is about 348.2128437667.

The spelling of 42221568 in words is "forty-two million, two hundred twenty-one thousand, five hundred sixty-eight".