42223421 has 8 divisors (see below), whose sum is σ = 42881664. Its totient is φ = 41569920.

The previous prime is 42223417. The next prime is 42223429. The reversal of 42223421 is 12432224.

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 42223421 - 2² = 42223417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42223393 and 42223402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42223429) 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, 19436 + ... + 21498.

It is an arithmetic number, because the mean of its divisors is an integer number (5360208).

Almost surely, 2^42223421 is an apocalyptic number.

It is an amenable number.

42223421 is a deficient number, since it is larger than the sum of its proper divisors (658243).

42223421 is a wasteful number, since it uses less digits than its factorization.

42223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371.

The product of its digits is 768, while the sum is 20.

The square root of 42223421 is about 6497.9551398882. The cubic root of 42223421 is about 348.2179377585.

Adding to 42223421 its reverse (12432224), we get a palindrome (54655645).

The spelling of 42223421 in words is "forty-two million, two hundred twenty-three thousand, four hundred twenty-one".