51442425422 has 4 divisors (see below), whose sum is σ = 77163638136. Its totient is φ = 25721212710.

The previous prime is 51442425421. The next prime is 51442425469. The reversal of 51442425422 is 22452424415.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51442425421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12860606354 + ... + 12860606357.

It is an arithmetic number, because the mean of its divisors is an integer number (19290909534).

Almost surely, 2^51442425422 is an apocalyptic number.

51442425422 is a deficient number, since it is larger than the sum of its proper divisors (25721212714).

51442425422 is a wasteful number, since it uses less digits than its factorization.

51442425422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25721212713.

The product of its digits is 102400, while the sum is 35.

Adding to 51442425422 its reverse (22452424415), we get a palindrome (73894849837).

The spelling of 51442425422 in words is "fifty-one billion, four hundred forty-two million, four hundred twenty-five thousand, four hundred twenty-two".