53448021 has 24 divisors (see below), whose sum is σ = 87886656. Its totient is φ = 30983040.

The previous prime is 53448001. The next prime is 53448037. The reversal of 53448021 is 12084435.

It is not a de Polignac number, because 53448021 - 2⁹ = 53447509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53448001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9460 + ... + 14013.

It is an arithmetic number, because the mean of its divisors is an integer number (3661944).

Almost surely, 2^53448021 is an apocalyptic number.

It is an amenable number.

53448021 is a deficient number, since it is larger than the sum of its proper divisors (34438635).

53448021 is a wasteful number, since it uses less digits than its factorization.

53448021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23513 (or 23510 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 53448021 is about 7310.8153444058. The cubic root of 53448021 is about 376.6840314477.

The spelling of 53448021 in words is "fifty-three million, four hundred forty-eight thousand, twenty-one".