648063221 has 8 divisors (see below), whose sum is σ = 707745024. Its totient is φ = 589785840.

The previous prime is 648063211. The next prime is 648063263. The reversal of 648063221 is 122360846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648063221 - 2²² = 643868917 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 (648063211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350141 + ... + 351986.

It is an arithmetic number, because the mean of its divisors is an integer number (88468128).

Almost surely, 2^648063221 is an apocalyptic number.

It is an amenable number.

648063221 is a deficient number, since it is larger than the sum of its proper divisors (59681803).

648063221 is a wasteful number, since it uses less digits than its factorization.

648063221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702211.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 648063221 is about 25457.0858701463. The cubic root of 648063221 is about 865.3778833866.

The spelling of 648063221 in words is "six hundred forty-eight million, sixty-three thousand, two hundred twenty-one".