34511221 has 2 divisors, whose sum is σ = 34511222. Its totient is φ = 34511220.

The previous prime is 34511219. The next prime is 34511227. The reversal of 34511221 is 12211543.

34511221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22184100 + 12327121 = 4710^2 + 3511^2 .

It is an emirp because it is prime and its reverse (12211543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34511221 - 2¹ = 34511219 is a prime.

Together with 34511219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34511227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17255610 + 17255611.

It is an arithmetic number, because the mean of its divisors is an integer number (17255611).

Almost surely, 2^34511221 is an apocalyptic number.

It is an amenable number.

34511221 is a deficient number, since it is larger than the sum of its proper divisors (1).

34511221 is an equidigital number, since it uses as much as digits as its factorization.

34511221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 19.

The square root of 34511221 is about 5874.6251795327. The cubic root of 34511221 is about 325.5767934821.

Adding to 34511221 its reverse (12211543), we get a palindrome (46722764).

The spelling of 34511221 in words is "thirty-four million, five hundred eleven thousand, two hundred twenty-one".