42537216 has 72 divisors (see below), whose sum is σ = 114578464. Its totient is φ = 14008320.

The previous prime is 42537211. The next prime is 42537233. The reversal of 42537216 is 61273524.

It is not an unprimeable number, because it can be changed into a prime (42537211) 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, 74211 + ... + 74781.

Almost surely, 2^42537216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42537216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57289232).

42537216 is an abundant number, since it is smaller than the sum of its proper divisors (72041248).

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

42537216 is an equidigital number, since it uses as much as digits as its factorization.

42537216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 673 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 42537216 is about 6522.0561175139. The cubic root of 42537216 is about 349.0784354760.

The spelling of 42537216 in words is "forty-two million, five hundred thirty-seven thousand, two hundred sixteen".