1521543350423 has 2 divisors, whose sum is σ = 1521543350424. Its totient is φ = 1521543350422.

The previous prime is 1521543350413. The next prime is 1521543350443. The reversal of 1521543350423 is 3240533451251.

It is a weak prime.

It is an emirp because it is prime and its reverse (3240533451251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1521543350423 - 2⁸ = 1521543350167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1521543350413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760771675211 + 760771675212.

It is an arithmetic number, because the mean of its divisors is an integer number (760771675212).

Almost surely, 2^{1521543350423} is an apocalyptic number.

1521543350423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521543350423 is an equidigital number, since it uses as much as digits as its factorization.

1521543350423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 1521543350423 in words is "one trillion, five hundred twenty-one billion, five hundred forty-three million, three hundred fifty thousand, four hundred twenty-three".