51931146427 has 8 divisors (see below), whose sum is σ = 55026383360. Its totient is φ = 48872111400.

The previous prime is 51931146373. The next prime is 51931146433. The reversal of 51931146427 is 72464113915.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51931146427 - 2⁷ = 51931146299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51931146437) by changing a digit.

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, 9047523 + ... + 9053260.

It is an arithmetic number, because the mean of its divisors is an integer number (6878297920).

Almost surely, 2^51931146427 is an apocalyptic number.

51931146427 is a deficient number, since it is larger than the sum of its proper divisors (3095236933).

51931146427 is a wasteful number, since it uses less digits than its factorization.

51931146427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18100953.

The product of its digits is 181440, while the sum is 43.

The spelling of 51931146427 in words is "fifty-one billion, nine hundred thirty-one million, one hundred forty-six thousand, four hundred twenty-seven".