42520554243 has 12 divisors (see below), whose sum is σ = 61421064120. Its totient is φ = 28345888896.

The previous prime is 42520554163. The next prime is 42520554247. The reversal of 42520554243 is 34245502524.

42520554243 is a `hidden beast` number, since 4 + 2 + 520 + 55 + 42 + 43 = 666.

It is not a de Polignac number, because 42520554243 - 2²⁸ = 42252118787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42520554198 and 42520554207.

It is not an unprimeable number, because it can be changed into a prime (42520554247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181348 + ... + 343406.

It is an arithmetic number, because the mean of its divisors is an integer number (5118422010).

Almost surely, 2^42520554243 is an apocalyptic number.

42520554243 is a deficient number, since it is larger than the sum of its proper divisors (18900509877).

42520554243 is a wasteful number, since it uses less digits than its factorization.

42520554243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191218 (or 191215 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 36.

The spelling of 42520554243 in words is "forty-two billion, five hundred twenty million, five hundred fifty-four thousand, two hundred forty-three".