34581221 has 2 divisors, whose sum is σ = 34581222. Its totient is φ = 34581220.

The previous prime is 34581193. The next prime is 34581227. The reversal of 34581221 is 12218543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30129121 + 4452100 = 5489^2 + 2110^2 .

It is a cyclic number.

It is not a de Polignac number, because 34581221 - 2¹⁰ = 34580197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34581227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17290610 + 17290611.

It is an arithmetic number, because the mean of its divisors is an integer number (17290611).

Almost surely, 2^34581221 is an apocalyptic number.

It is an amenable number.

34581221 is a deficient number, since it is larger than the sum of its proper divisors (1).

34581221 is an equidigital number, since it uses as much as digits as its factorization.

34581221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 26.

The square root of 34581221 is about 5880.5799884025. The cubic root of 34581221 is about 325.7967700912.

Adding to 34581221 its reverse (12218543), we get a palindrome (46799764).

The spelling of 34581221 in words is "thirty-four million, five hundred eighty-one thousand, two hundred twenty-one".