521861341 has 2 divisors, whose sum is σ = 521861342. Its totient is φ = 521861340.

The previous prime is 521861311. The next prime is 521861369. The reversal of 521861341 is 143168125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490445316 + 31416025 = 22146^2 + 5605^2 .

It is a cyclic number.

It is not a de Polignac number, because 521861341 - 2⁵ = 521861309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521861311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260930670 + 260930671.

It is an arithmetic number, because the mean of its divisors is an integer number (260930671).

Almost surely, 2^521861341 is an apocalyptic number.

It is an amenable number.

521861341 is a deficient number, since it is larger than the sum of its proper divisors (1).

521861341 is an equidigital number, since it uses as much as digits as its factorization.

521861341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 521861341 is about 22844.2846462742. The cubic root of 521861341 is about 805.1034888748.

The spelling of 521861341 in words is "five hundred twenty-one million, eight hundred sixty-one thousand, three hundred forty-one".