521133494423 has 2 divisors, whose sum is σ = 521133494424. Its totient is φ = 521133494422.

The previous prime is 521133494411. The next prime is 521133494447. The reversal of 521133494423 is 324494331125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521133494423 - 2¹⁰ = 521133493399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521133494923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260566747211 + 260566747212.

It is an arithmetic number, because the mean of its divisors is an integer number (260566747212).

Almost surely, 2^521133494423 is an apocalyptic number.

521133494423 is a deficient number, since it is larger than the sum of its proper divisors (1).

521133494423 is an equidigital number, since it uses as much as digits as its factorization.

521133494423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 41.

The spelling of 521133494423 in words is "five hundred twenty-one billion, one hundred thirty-three million, four hundred ninety-four thousand, four hundred twenty-three".