51431121433 has 8 divisors (see below), whose sum is σ = 52868230208. Its totient is φ = 49996490544.

The previous prime is 51431121409. The next prime is 51431121439. The reversal of 51431121433 is 33412113415.

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 51431121433 - 2⁹ = 51431120921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51431121439) 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, 577341 + ... + 660442.

It is an arithmetic number, because the mean of its divisors is an integer number (6608528776).

Almost surely, 2^51431121433 is an apocalyptic number.

It is an amenable number.

51431121433 is a deficient number, since it is larger than the sum of its proper divisors (1437108775).

51431121433 is a wasteful number, since it uses less digits than its factorization.

51431121433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238943.

The product of its digits is 4320, while the sum is 28.

Adding to 51431121433 its reverse (33412113415), we get a palindrome (84843234848).

The spelling of 51431121433 in words is "fifty-one billion, four hundred thirty-one million, one hundred twenty-one thousand, four hundred thirty-three".