42051051051 has 4 divisors (see below), whose sum is σ = 56068068072. Its totient is φ = 28034034032.

The previous prime is 42051051043. The next prime is 42051051109. The reversal of 42051051051 is 15015015024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42051051051 - 2³ = 42051051043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42051051451) 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 3 ways as a sum of consecutive naturals, for example, 7008508506 + ... + 7008508511.

It is an arithmetic number, because the mean of its divisors is an integer number (14017017018).

Almost surely, 2^42051051051 is an apocalyptic number.

42051051051 is a deficient number, since it is larger than the sum of its proper divisors (14017017021).

42051051051 is a wasteful number, since it uses less digits than its factorization.

42051051051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14017017020.

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 42051051051 its reverse (15015015024), we get a palindrome (57066066075).

The spelling of 42051051051 in words is "forty-two billion, fifty-one million, fifty-one thousand, fifty-one".