43542220 has 48 divisors (see below), whose sum is σ = 96445440. Its totient is φ = 16479936.

The previous prime is 43542217. The next prime is 43542221. The reversal of 43542220 is 2224534.

It is a junction number, because it is equal to n+sod(n) for n = 43542191 and 43542200.

It is not an unprimeable number, because it can be changed into a prime (43542221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46921 + ... + 47839.

It is an arithmetic number, because the mean of its divisors is an integer number (2009280).

Almost surely, 2^43542220 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 43542220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48222720).

43542220 is an abundant number, since it is smaller than the sum of its proper divisors (52903220).

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

43542220 is a wasteful number, since it uses less digits than its factorization.

43542220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 43542220 is about 6598.6528928259. The cubic root of 43542220 is about 351.8062272855.

Adding to 43542220 its reverse (2224534), we get a palindrome (45766754).

The spelling of 43542220 in words is "forty-three million, five hundred forty-two thousand, two hundred twenty".