51330420042 has 16 divisors (see below), whose sum is σ = 111993643872. Its totient is φ = 15554672720.

The previous prime is 51330420019. The next prime is 51330420049. The reversal of 51330420042 is 24002403315.

It is a junction number, because it is equal to n+sod(n) for n = 51330419994 and 51330420021.

It is not an unprimeable number, because it can be changed into a prime (51330420049) 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 7 ways as a sum of consecutive naturals, for example, 388866753 + ... + 388866884.

It is an arithmetic number, because the mean of its divisors is an integer number (6999602742).

Almost surely, 2^51330420042 is an apocalyptic number.

51330420042 is an abundant number, since it is smaller than the sum of its proper divisors (60663223830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51330420042 is a wasteful number, since it uses less digits than its factorization.

51330420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777733653.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 51330420042 its reverse (24002403315), we get a palindrome (75332823357).

The spelling of 51330420042 in words is "fifty-one billion, three hundred thirty million, four hundred twenty thousand, forty-two".