650331221 has 4 divisors (see below), whose sum is σ = 684559200. Its totient is φ = 616103244.

The previous prime is 650331197. The next prime is 650331247. The reversal of 650331221 is 122133056.

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 650331221 - 2¹⁴ = 650314837 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 (650331281) 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, 17113961 + ... + 17113998.

It is an arithmetic number, because the mean of its divisors is an integer number (171139800).

Almost surely, 2^650331221 is an apocalyptic number.

It is an amenable number.

650331221 is a deficient number, since it is larger than the sum of its proper divisors (34227979).

650331221 is a wasteful number, since it uses less digits than its factorization.

650331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34227978.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 650331221 is about 25501.5925188997. The cubic root of 650331221 is about 866.3862170649.

Adding to 650331221 its reverse (122133056), we get a palindrome (772464277).

The spelling of 650331221 in words is "six hundred fifty million, three hundred thirty-one thousand, two hundred twenty-one".