65285221 has 4 divisors (see below), whose sum is σ = 65311200. Its totient is φ = 65259244.

The previous prime is 65285173. The next prime is 65285251. The reversal of 65285221 is 12258256.

65285221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65285221 - 2¹¹ = 65283173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65285251) 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 in 3 ways as a sum of consecutive naturals, for example, 8761 + ... + 14398.

It is an arithmetic number, because the mean of its divisors is an integer number (16327800).

Almost surely, 2^65285221 is an apocalyptic number.

It is an amenable number.

65285221 is a deficient number, since it is larger than the sum of its proper divisors (25979).

65285221 is a wasteful number, since it uses less digits than its factorization.

65285221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25978.

The product of its digits is 9600, while the sum is 31.

The square root of 65285221 is about 8079.9270417498. The cubic root of 65285221 is about 402.6598179684.

The spelling of 65285221 in words is "sixty-five million, two hundred eighty-five thousand, two hundred twenty-one".