648221301 has 72 divisors (see below), whose sum is σ = 1171609920. Its totient is φ = 338128128.

The previous prime is 648221291. The next prime is 648221303. The reversal of 648221301 is 103122846.

648221301 is a `hidden beast` number, since 648 + 2 + 2 + 13 + 0 + 1 = 666.

It is not a de Polignac number, because 648221301 - 2⁵ = 648221269 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648221303) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1138945 + ... + 1139513.

It is an arithmetic number, because the mean of its divisors is an integer number (16272360).

Almost surely, 2^648221301 is an apocalyptic number.

It is an amenable number.

648221301 is a deficient number, since it is larger than the sum of its proper divisors (523388619).

648221301 is a wasteful number, since it uses less digits than its factorization.

648221301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 648221301 is about 25460.1905138198. The cubic root of 648221301 is about 865.4482406243.

The spelling of 648221301 in words is "six hundred forty-eight million, two hundred twenty-one thousand, three hundred one".