51431113012 has 24 divisors (see below), whose sum is σ = 91347088896. Its totient is φ = 25333701888.

The previous prime is 51431112989. The next prime is 51431113039. The reversal of 51431113012 is 21031113415.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102228 + ... + 336619.

It is an arithmetic number, because the mean of its divisors is an integer number (3806128704).

Almost surely, 2^51431113012 is an apocalyptic number.

It is an amenable number.

51431113012 is a deficient number, since it is larger than the sum of its proper divisors (39915975884).

51431113012 is a wasteful number, since it uses less digits than its factorization.

51431113012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439287 (or 439285 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 51431113012 its reverse (21031113415), we get a palindrome (72462226427).

The spelling of 51431113012 in words is "fifty-one billion, four hundred thirty-one million, one hundred thirteen thousand, twelve".