51431223042 has 12 divisors (see below), whose sum is σ = 111434316630. Its totient is φ = 17143741008.

The previous prime is 51431222977. The next prime is 51431223083. The reversal of 51431223042 is 24032213415.

51431223042 is a `hidden beast` number, since 5 + 1 + 431 + 223 + 0 + 4 + 2 = 666.

51431223042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 43719046281 + 7712176761 = 209091^2 + 87819^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51431222997 and 51431223015.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1428645067 + ... + 1428645102.

Almost surely, 2^51431223042 is an apocalyptic number.

51431223042 is an abundant number, since it is smaller than the sum of its proper divisors (60003093588).

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

51431223042 is a wasteful number, since it uses less digits than its factorization.

51431223042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857290177 (or 2857290174 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 51431223042 its reverse (24032213415), we get a palindrome (75463436457).

The spelling of 51431223042 in words is "fifty-one billion, four hundred thirty-one million, two hundred twenty-three thousand, forty-two".