650009221 has 4 divisors (see below), whose sum is σ = 650073600. Its totient is φ = 649944844.

The previous prime is 650009177. The next prime is 650009231. The reversal of 650009221 is 122900056.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 650009221 - 2¹¹ = 650007173 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 (650009231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13381 + ... + 38458.

It is an arithmetic number, because the mean of its divisors is an integer number (162518400).

Almost surely, 2^650009221 is an apocalyptic number.

It is an amenable number.

650009221 is a deficient number, since it is larger than the sum of its proper divisors (64379).

650009221 is a wasteful number, since it uses less digits than its factorization.

650009221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64378.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 650009221 is about 25495.2784060108. The cubic root of 650009221 is about 866.2432015219.

Adding to 650009221 its reverse (122900056), we get a palindrome (772909277).

The spelling of 650009221 in words is "six hundred fifty million, nine thousand, two hundred twenty-one".