42324221 has 4 divisors (see below), whose sum is σ = 42337344. Its totient is φ = 42311100.

The previous prime is 42324211. The next prime is 42324241. The reversal of 42324221 is 12242324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42324221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42324193 and 42324202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42324211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006 + ... + 9416.

It is an arithmetic number, because the mean of its divisors is an integer number (10584336).

Almost surely, 2^42324221 is an apocalyptic number.

It is an amenable number.

42324221 is a deficient number, since it is larger than the sum of its proper divisors (13123).

42324221 is an equidigital number, since it uses as much as digits as its factorization.

42324221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13122.

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

The square root of 42324221 is about 6505.7068024927. The cubic root of 42324221 is about 348.4948178452.

Adding to 42324221 its reverse (12242324), we get a palindrome (54566545).

The spelling of 42324221 in words is "forty-two million, three hundred twenty-four thousand, two hundred twenty-one".