42542551523 has 2 divisors, whose sum is σ = 42542551524. Its totient is φ = 42542551522.

The previous prime is 42542551517. The next prime is 42542551531. The reversal of 42542551523 is 32515524524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42542551523 - 2⁸ = 42542551267 is a prime.

It is not a weakly prime, because it can be changed into another prime (42542551223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271275761 + 21271275762.

It is an arithmetic number, because the mean of its divisors is an integer number (21271275762).

Almost surely, 2^42542551523 is an apocalyptic number.

42542551523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42542551523 is an equidigital number, since it uses as much as digits as its factorization.

42542551523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240000, while the sum is 38.

The spelling of 42542551523 in words is "forty-two billion, five hundred forty-two million, five hundred fifty-one thousand, five hundred twenty-three".