53104701721 has 4 divisors (see below), whose sum is σ = 53105163444. Its totient is φ = 53104240000.

The previous prime is 53104701673. The next prime is 53104701803. The reversal of 53104701721 is 12710740135.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2001578121 + 51103123600 = 44739^2 + 226060^2 .

It is a cyclic number.

It is not a de Polignac number, because 53104701721 - 2⁷ = 53104701593 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53104701421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94641 + ... + 339361.

It is an arithmetic number, because the mean of its divisors is an integer number (13276290861).

Almost surely, 2^53104701721 is an apocalyptic number.

It is an amenable number.

53104701721 is a deficient number, since it is larger than the sum of its proper divisors (461723).

53104701721 is a wasteful number, since it uses less digits than its factorization.

53104701721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461722.

The product of its (nonzero) digits is 5880, while the sum is 31.

The spelling of 53104701721 in words is "fifty-three billion, one hundred four million, seven hundred one thousand, seven hundred twenty-one".