42222321 has 6 divisors (see below), whose sum is σ = 60987810. Its totient is φ = 28148208.

The previous prime is 42222317. The next prime is 42222329. The reversal of 42222321 is 12322224.

42222321 is a `hidden beast` number, since 422 + 223 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 33005025 + 9217296 = 5745^2 + 3036^2 .

It is not a de Polignac number, because 42222321 - 2² = 42222317 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42222294 and 42222303.

It is not an unprimeable number, because it can be changed into a prime (42222329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2345676 + ... + 2345693.

It is an arithmetic number, because the mean of its divisors is an integer number (10164635).

Almost surely, 2^42222321 is an apocalyptic number.

It is an amenable number.

42222321 is a deficient number, since it is larger than the sum of its proper divisors (18765489).

42222321 is a wasteful number, since it uses less digits than its factorization.

42222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691375 (or 4691372 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 42222321 is about 6497.8704973245. The cubic root of 42222321 is about 348.2149138202.

Adding to 42222321 its reverse (12322224), we get a palindrome (54544545).

The spelling of 42222321 in words is "forty-two million, two hundred twenty-two thousand, three hundred twenty-one".