648221325 has 12 divisors (see below), whose sum is σ = 1071726048. Its totient is φ = 345718000.

The previous prime is 648221317. The next prime is 648221341. The reversal of 648221325 is 523122846.

It is not a de Polignac number, because 648221325 - 2³ = 648221317 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4321401 + ... + 4321550.

It is an arithmetic number, because the mean of its divisors is an integer number (89310504).

Almost surely, 2^648221325 is an apocalyptic number.

It is an amenable number.

648221325 is a deficient number, since it is larger than the sum of its proper divisors (423504723).

648221325 is a wasteful number, since it uses less digits than its factorization.

648221325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8642964 (or 8642959 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 648221325 is about 25460.1909851438. The cubic root of 648221325 is about 865.4482513052.

The spelling of 648221325 in words is "six hundred forty-eight million, two hundred twenty-one thousand, three hundred twenty-five".