521743125372361 has 2 divisors, whose sum is σ = 521743125372362. Its totient is φ = 521743125372360.

The previous prime is 521743125372349. The next prime is 521743125372397. The reversal of 521743125372361 is 163273521347125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 516549029121225 + 5194096251136 = 22727715^2 + 2279056^2 .

It is a cyclic number.

It is not a de Polignac number, because 521743125372361 - 2⁷ = 521743125372233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521743125372299 and 521743125372308.

It is not a weakly prime, because it can be changed into another prime (521743125172361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260871562686180 + 260871562686181.

It is an arithmetic number, because the mean of its divisors is an integer number (260871562686181).

Almost surely, 2^{521743125372361} is an apocalyptic number.

It is an amenable number.

521743125372361 is a deficient number, since it is larger than the sum of its proper divisors (1).

521743125372361 is an equidigital number, since it uses as much as digits as its factorization.

521743125372361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6350400, while the sum is 52.

The spelling of 521743125372361 in words is "five hundred twenty-one trillion, seven hundred forty-three billion, one hundred twenty-five million, three hundred seventy-two thousand, three hundred sixty-one".