53441721 has 8 divisors (see below), whose sum is σ = 79172960. Its totient is φ = 35627796.

The previous prime is 53441677. The next prime is 53441723. The reversal of 53441721 is 12714435.

It is not a de Polignac number, because 53441721 - 2⁷ = 53441593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1979323 = 53441721 / (5 + 3 + 4 + 4 + 1 + 7 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53441723) 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, 989635 + ... + 989688.

It is an arithmetic number, because the mean of its divisors is an integer number (9896620).

Almost surely, 2^53441721 is an apocalyptic number.

It is an amenable number.

53441721 is a deficient number, since it is larger than the sum of its proper divisors (25731239).

53441721 is a wasteful number, since it uses less digits than its factorization.

53441721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979332 (or 1979326 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 53441721 is about 7310.3844632140. The cubic root of 53441721 is about 376.6692307585.

The spelling of 53441721 in words is "fifty-three million, four hundred forty-one thousand, seven hundred twenty-one".