650007221 has 8 divisors (see below), whose sum is σ = 671230560. Its totient is φ = 629061552.

The previous prime is 650007203. The next prime is 650007251. The reversal of 650007221 is 122700056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650007221 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 (650007251) 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 7 ways as a sum of consecutive naturals, for example, 64655 + ... + 74028.

It is an arithmetic number, because the mean of its divisors is an integer number (83903820).

Almost surely, 2^650007221 is an apocalyptic number.

It is an amenable number.

650007221 is a deficient number, since it is larger than the sum of its proper divisors (21223339).

650007221 is a wasteful number, since it uses less digits than its factorization.

650007221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138835.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 650007221 is about 25495.2391830318. The cubic root of 650007221 is about 866.2423130791.

Adding to 650007221 its reverse (122700056), we get a palindrome (772707277).

The spelling of 650007221 in words is "six hundred fifty million, seven thousand, two hundred twenty-one".