53250921 has 6 divisors (see below), whose sum is σ = 76918010. Its totient is φ = 35500608.

The previous prime is 53250917. The next prime is 53250947. The reversal of 53250921 is 12905235.

53250921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 45765225 + 7485696 = 6765^2 + 2736^2 .

It is not a de Polignac number, because 53250921 - 2² = 53250917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53252921) 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 5 ways as a sum of consecutive naturals, for example, 2958376 + ... + 2958393.

Almost surely, 2^53250921 is an apocalyptic number.

It is an amenable number.

53250921 is a deficient number, since it is larger than the sum of its proper divisors (23667089).

53250921 is a wasteful number, since it uses less digits than its factorization.

53250921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5916775 (or 5916772 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 53250921 is about 7297.3228652705. The cubic root of 53250921 is about 376.2204291650.

The spelling of 53250921 in words is "fifty-three million, two hundred fifty thousand, nine hundred twenty-one".