34212221 has 4 divisors (see below), whose sum is σ = 34438944. Its totient is φ = 33985500.

The previous prime is 34212203. The next prime is 34212229. The reversal of 34212221 is 12221243.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34212221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 34212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34212229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113135 + ... + 113436.

It is an arithmetic number, because the mean of its divisors is an integer number (8609736).

Almost surely, 2^34212221 is an apocalyptic number.

It is an amenable number.

34212221 is a deficient number, since it is larger than the sum of its proper divisors (226723).

34212221 is a wasteful number, since it uses less digits than its factorization.

34212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226722.

The product of its digits is 192, while the sum is 17.

The square root of 34212221 is about 5849.1213870119. The cubic root of 34212221 is about 324.6338155751.

Adding to 34212221 its reverse (12221243), we get a palindrome (46433464).

The spelling of 34212221 in words is "thirty-four million, two hundred twelve thousand, two hundred twenty-one".