51430121142 has 16 divisors (see below), whose sum is σ = 102977006832. Its totient is φ = 17123912960.

The previous prime is 51430121117. The next prime is 51430121143. The reversal of 51430121142 is 24112103415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51430121143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4859463 + ... + 4870034.

It is an arithmetic number, because the mean of its divisors is an integer number (6436062927).

Almost surely, 2^51430121142 is an apocalyptic number.

51430121142 is an abundant number, since it is smaller than the sum of its proper divisors (51546885690).

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

51430121142 is a wasteful number, since it uses less digits than its factorization.

51430121142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730383.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 51430121142 its reverse (24112103415), we get a palindrome (75542224557).

The spelling of 51430121142 in words is "fifty-one billion, four hundred thirty million, one hundred twenty-one thousand, one hundred forty-two".