65534221 has 4 divisors (see below), whose sum is σ = 65608992. Its totient is φ = 65459452.

The previous prime is 65534111. The next prime is 65534239. The reversal of 65534221 is 12243556.

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 not a de Polignac number, because 65534221 - 2⁹ = 65533709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65534221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65534251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36055 + ... + 37828.

It is an arithmetic number, because the mean of its divisors is an integer number (16402248).

Almost surely, 2^65534221 is an apocalyptic number.

It is an amenable number.

65534221 is a deficient number, since it is larger than the sum of its proper divisors (74771).

65534221 is an equidigital number, since it uses as much as digits as its factorization.

65534221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74770.

The product of its digits is 7200, while the sum is 28.

The square root of 65534221 is about 8095.3209324893. The cubic root of 65534221 is about 403.1710878221.

Adding to 65534221 its reverse (12243556), we get a palindrome (77777777).

The spelling of 65534221 in words is "sixty-five million, five hundred thirty-four thousand, two hundred twenty-one".