42321220 has 24 divisors (see below), whose sum is σ = 90203904. Its totient is φ = 16675296.

The previous prime is 42321203. The next prime is 42321241. The reversal of 42321220 is 2212324.

It is a junction number, because it is equal to n+sod(n) for n = 42321194 and 42321203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14452 + ... + 17131.

It is an arithmetic number, because the mean of its divisors is an integer number (3758496).

Almost surely, 2^42321220 is an apocalyptic number.

It is an amenable number.

42321220 is an abundant number, since it is smaller than the sum of its proper divisors (47882684).

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

42321220 is a wasteful number, since it uses less digits than its factorization.

42321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31659 (or 31657 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42321220 is about 6505.4761547484. The cubic root of 42321220 is about 348.4865809725.

Adding to 42321220 its reverse (2212324), we get a palindrome (44533544).

The spelling of 42321220 in words is "forty-two million, three hundred twenty-one thousand, two hundred twenty".