34020221 has 2 divisors, whose sum is σ = 34020222. Its totient is φ = 34020220.

The previous prime is 34020209. The next prime is 34020229. The reversal of 34020221 is 12202043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33235225 + 784996 = 5765^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 34020221 - 2¹⁰ = 34019197 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 34020196 and 34020205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34020229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17010110 + 17010111.

It is an arithmetic number, because the mean of its divisors is an integer number (17010111).

Almost surely, 2^34020221 is an apocalyptic number.

It is an amenable number.

34020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

34020221 is an equidigital number, since it uses as much as digits as its factorization.

34020221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 34020221 is about 5832.6855735587. The cubic root of 34020221 is about 324.0253911158.

Adding to 34020221 its reverse (12202043), we get a palindrome (46222264).

The spelling of 34020221 in words is "thirty-four million, twenty thousand, two hundred twenty-one".