42220321 has 8 divisors (see below), whose sum is σ = 49601664. Its totient is φ = 35429520.

The previous prime is 42220319. The next prime is 42220331. The reversal of 42220321 is 12302224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42220321 - 2¹ = 42220319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42220295 and 42220304.

It is not an unprimeable number, because it can be changed into a prime (42220331) 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, 147481 + ... + 147766.

It is an arithmetic number, because the mean of its divisors is an integer number (6200208).

Almost surely, 2^42220321 is an apocalyptic number.

It is an amenable number.

42220321 is a deficient number, since it is larger than the sum of its proper divisors (7381343).

42220321 is a wasteful number, since it uses less digits than its factorization.

42220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295271.

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

The square root of 42220321 is about 6497.7165989292. The cubic root of 42220321 is about 348.2094156161.

Adding to 42220321 its reverse (12302224), we get a palindrome (54522545).

It can be divided in two parts, 422203 and 21, that added together give a palindrome (422224).

The spelling of 42220321 in words is "forty-two million, two hundred twenty thousand, three hundred twenty-one".