51355212412 has 24 divisors (see below), whose sum is σ = 103284236160. Its totient is φ = 21886417200.

The previous prime is 51355212407. The next prime is 51355212413. The reversal of 51355212412 is 21421255315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51355212413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5118214 + ... + 5128237.

It is an arithmetic number, because the mean of its divisors is an integer number (4303509840).

Almost surely, 2^51355212412 is an apocalyptic number.

It is an amenable number.

51355212412 is an abundant number, since it is smaller than the sum of its proper divisors (51929023748).

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

51355212412 is a wasteful number, since it uses less digits than its factorization.

51355212412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10246641 (or 10246639 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

Adding to 51355212412 its reverse (21421255315), we get a palindrome (72776467727).

The spelling of 51355212412 in words is "fifty-one billion, three hundred fifty-five million, two hundred twelve thousand, four hundred twelve".