51241230012 has 72 divisors (see below), whose sum is σ = 139374466560. Its totient is φ = 14609706720.

The previous prime is 51241229999. The next prime is 51241230067. The reversal of 51241230012 is 21003214215.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 23 ways as a sum of consecutive naturals, for example, 190687 + ... + 372617.

It is an arithmetic number, because the mean of its divisors is an integer number (1935756480).

Almost surely, 2^51241230012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51241230012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69687233280).

51241230012 is an abundant number, since it is smaller than the sum of its proper divisors (88133236548).

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

51241230012 is a wasteful number, since it uses less digits than its factorization.

51241230012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182431 (or 182422 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 51241230012 its reverse (21003214215), we get a palindrome (72244444227).

The spelling of 51241230012 in words is "fifty-one billion, two hundred forty-one million, two hundred thirty thousand, twelve".