34213221 has 24 divisors (see below), whose sum is σ = 57636800. Its totient is φ = 19548648.

The previous prime is 34213219. The next prime is 34213237. The reversal of 34213221 is 12231243.

34213221 is a `hidden beast` number, since 342 + 1 + 322 + 1 = 666.

It is not a de Polignac number, because 34213221 - 2¹ = 34213219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 34213194 and 34213203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34213261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2455 + ... + 8628.

Almost surely, 2^34213221 is an apocalyptic number.

It is an amenable number.

34213221 is a deficient number, since it is larger than the sum of its proper divisors (23423579).

34213221 is a wasteful number, since it uses less digits than its factorization.

34213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110 (or 11093 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 34213221 is about 5849.2068693114. The cubic root of 34213221 is about 324.6369784863.

Adding to 34213221 its reverse (12231243), we get a palindrome (46444464).

The spelling of 34213221 in words is "thirty-four million, two hundred thirteen thousand, two hundred twenty-one".