51242130242 has 16 divisors (see below), whose sum is σ = 78209172864. Its totient is φ = 25173330000.

The previous prime is 51242130223. The next prime is 51242130271. The reversal of 51242130242 is 24203124215.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119384 + ... + 341667.

It is an arithmetic number, because the mean of its divisors is an integer number (4888073304).

Almost surely, 2^51242130242 is an apocalyptic number.

51242130242 is a deficient number, since it is larger than the sum of its proper divisors (26967042622).

51242130242 is a wasteful number, since it uses less digits than its factorization.

51242130242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462025.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 51242130242 its reverse (24203124215), we get a palindrome (75445254457).

The spelling of 51242130242 in words is "fifty-one billion, two hundred forty-two million, one hundred thirty thousand, two hundred forty-two".