53648321 has 4 divisors (see below), whose sum is σ = 55378944. Its totient is φ = 51917700.

The previous prime is 53648303. The next prime is 53648323. The reversal of 53648321 is 12384635.

53648321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12384635 = 5 ⋅2476927.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53648321 is a prime.

It is a super-2 number, since 2×53648321² = 5756284692238082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53648323) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 865265 + ... + 865326.

It is an arithmetic number, because the mean of its divisors is an integer number (13844736).

Almost surely, 2^53648321 is an apocalyptic number.

It is an amenable number.

53648321 is a deficient number, since it is larger than the sum of its proper divisors (1730623).

53648321 is a wasteful number, since it uses less digits than its factorization.

53648321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730622.

The product of its digits is 17280, while the sum is 32.

The square root of 53648321 is about 7324.5014164788. The cubic root of 53648321 is about 377.1539943186.

The spelling of 53648321 in words is "fifty-three million, six hundred forty-eight thousand, three hundred twenty-one".