650120521 has 4 divisors (see below), whose sum is σ = 672538500. Its totient is φ = 627702544.

The previous prime is 650120501. The next prime is 650120531. The reversal of 650120521 is 125021056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 441000000 + 209120521 = 21000^2 + 14461^2 .

It is a cyclic number.

It is not a de Polignac number, because 650120521 - 2¹³ = 650112329 is a prime.

It is a super-3 number, since 3×650120521³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 650120492 and 650120501.

It is not an unprimeable number, because it can be changed into a prime (650120501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11208946 + ... + 11209003.

It is an arithmetic number, because the mean of its divisors is an integer number (168134625).

Almost surely, 2^650120521 is an apocalyptic number.

It is an amenable number.

650120521 is a deficient number, since it is larger than the sum of its proper divisors (22417979).

650120521 is a wasteful number, since it uses less digits than its factorization.

650120521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22417978.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 650120521 is about 25497.4610696830. The cubic root of 650120521 is about 866.2926404955.

Adding to 650120521 its reverse (125021056), we get a palindrome (775141577).

The spelling of 650120521 in words is "six hundred fifty million, one hundred twenty thousand, five hundred twenty-one".