521201431337 has 2 divisors, whose sum is σ = 521201431338. Its totient is φ = 521201431336.

The previous prime is 521201431297. The next prime is 521201431391. The reversal of 521201431337 is 733134102125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367549975081 + 153651456256 = 606259^2 + 391984^2 .

It is a cyclic number.

It is not a de Polignac number, because 521201431337 - 2¹⁸ = 521201169193 is a prime.

It is not a weakly prime, because it can be changed into another prime (521201431397) 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, 260600715668 + 260600715669.

It is an arithmetic number, because the mean of its divisors is an integer number (260600715669).

Almost surely, 2^521201431337 is an apocalyptic number.

It is an amenable number.

521201431337 is a deficient number, since it is larger than the sum of its proper divisors (1).

521201431337 is an equidigital number, since it uses as much as digits as its factorization.

521201431337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 521201431337 in words is "five hundred twenty-one billion, two hundred one million, four hundred thirty-one thousand, three hundred thirty-seven".