51231021302 has 16 divisors (see below), whose sum is σ = 77034944832. Its totient is φ = 25552739520.

The previous prime is 51231021293. The next prime is 51231021329. The reversal of 51231021302 is 20312013215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4584602 + ... + 4595762.

It is an arithmetic number, because the mean of its divisors is an integer number (4814684052).

Almost surely, 2^51231021302 is an apocalyptic number.

51231021302 is a deficient number, since it is larger than the sum of its proper divisors (25803923530).

51231021302 is a wasteful number, since it uses less digits than its factorization.

51231021302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16583.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 51231021302 its reverse (20312013215), we get a palindrome (71543034517).

The spelling of 51231021302 in words is "fifty-one billion, two hundred thirty-one million, twenty-one thousand, three hundred two".