51021430312 has 16 divisors (see below), whose sum is σ = 98250727860. Its totient is φ = 24821236224.

The previous prime is 51021430301. The next prime is 51021430333. The reversal of 51021430312 is 21303412015.

It is a happy number.

51021430312 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 2 ways, for example, as 35098523716 + 15922906596 = 187346^2 + 126186^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86184553 + ... + 86185144.

Almost surely, 2^51021430312 is an apocalyptic number.

It is an amenable number.

51021430312 is a deficient number, since it is larger than the sum of its proper divisors (47229297548).

51021430312 is a wasteful number, since it uses less digits than its factorization.

51021430312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172369740 (or 172369736 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 51021430312 its reverse (21303412015), we get a palindrome (72324842327).

The spelling of 51021430312 in words is "fifty-one billion, twenty-one million, four hundred thirty thousand, three hundred twelve".