648227201 has 4 divisors (see below), whose sum is σ = 648334932. Its totient is φ = 648119472.

The previous prime is 648227183. The next prime is 648227207. The reversal of 648227201 is 102722846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102722846 = 2 ⋅51361423.

It can be written as a sum of positive squares in 2 ways, for example, as 235162225 + 413064976 = 15335^2 + 20324^2 .

It is a cyclic number.

It is not a de Polignac number, because 648227201 - 2¹⁰ = 648226177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (648227207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44270 + ... + 57063.

It is an arithmetic number, because the mean of its divisors is an integer number (162083733).

Almost surely, 2^648227201 is an apocalyptic number.

It is an amenable number.

648227201 is a deficient number, since it is larger than the sum of its proper divisors (107731).

648227201 is a wasteful number, since it uses less digits than its factorization.

648227201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107730.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 648227201 is about 25460.3063807174. The cubic root of 648227201 is about 865.4508663373.

The spelling of 648227201 in words is "six hundred forty-eight million, two hundred twenty-seven thousand, two hundred one".