52718304521 has 2 divisors, whose sum is σ = 52718304522. Its totient is φ = 52718304520.

The previous prime is 52718304487. The next prime is 52718304547. The reversal of 52718304521 is 12540381725.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47532720400 + 5185584121 = 218020^2 + 72011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52718304521 is a prime.

It is not a weakly prime, because it can be changed into another prime (52718804521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26359152260 + 26359152261.

It is an arithmetic number, because the mean of its divisors is an integer number (26359152261).

Almost surely, 2^52718304521 is an apocalyptic number.

It is an amenable number.

52718304521 is a deficient number, since it is larger than the sum of its proper divisors (1).

52718304521 is an equidigital number, since it uses as much as digits as its factorization.

52718304521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 52718304521 in words is "fifty-two billion, seven hundred eighteen million, three hundred four thousand, five hundred twenty-one".