53268721 has 4 divisors (see below), whose sum is σ = 58111344. Its totient is φ = 48426100.

The previous prime is 53268707. The next prime is 53268731. The reversal of 53268721 is 12786235.

It is a happy number.

53268721 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.

It is a cyclic number.

It is not a de Polignac number, because 53268721 - 2⁵ = 53268689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53268731) 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, 2421295 + ... + 2421316.

It is an arithmetic number, because the mean of its divisors is an integer number (14527836).

Almost surely, 2^53268721 is an apocalyptic number.

It is an amenable number.

53268721 is a deficient number, since it is larger than the sum of its proper divisors (4842623).

53268721 is a wasteful number, since it uses less digits than its factorization.

53268721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4842622.

The product of its digits is 20160, while the sum is 34.

The square root of 53268721 is about 7298.5423887239. The cubic root of 53268721 is about 376.2623437928.

The spelling of 53268721 in words is "fifty-three million, two hundred sixty-eight thousand, seven hundred twenty-one".