53086691321 has 2 divisors, whose sum is σ = 53086691322. Its totient is φ = 53086691320.

The previous prime is 53086691291. The next prime is 53086691323. The reversal of 53086691321 is 12319668035.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47452087225 + 5634604096 = 217835^2 + 75064^2 .

It is a cyclic number.

It is not a de Polignac number, because 53086691321 - 2¹⁸ = 53086429177 is a prime.

It is a super-2 number, since 2×53086691321² (a number of 22 digits) contains 22 as substring.

Together with 53086691323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53086691323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26543345660 + 26543345661.

It is an arithmetic number, because the mean of its divisors is an integer number (26543345661).

Almost surely, 2^53086691321 is an apocalyptic number.

It is an amenable number.

53086691321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53086691321 is an equidigital number, since it uses as much as digits as its factorization.

53086691321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 53086691321 in words is "fifty-three billion, eighty-six million, six hundred ninety-one thousand, three hundred twenty-one".