52404316421 has 4 divisors (see below), whose sum is σ = 52415535372. Its totient is φ = 52393097472.

The previous prime is 52404316381. The next prime is 52404316441. The reversal of 52404316421 is 12461340425.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41681713921 + 10722602500 = 204161^2 + 103550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52404316421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52404316441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5602466 + ... + 5611811.

It is an arithmetic number, because the mean of its divisors is an integer number (13103883843).

Almost surely, 2^52404316421 is an apocalyptic number.

It is an amenable number.

52404316421 is a deficient number, since it is larger than the sum of its proper divisors (11218951).

52404316421 is a wasteful number, since it uses less digits than its factorization.

52404316421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11218950.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 52404316421 its reverse (12461340425), we get a palindrome (64865656846).

The spelling of 52404316421 in words is "fifty-two billion, four hundred four million, three hundred sixteen thousand, four hundred twenty-one".