51103105212 has 48 divisors (see below), whose sum is σ = 119634641280. Its totient is φ = 16978133568.

The previous prime is 51103105211. The next prime is 51103105219. The reversal of 51103105212 is 21250130115.

It is a super-2 number, since 2×51103105212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51103105211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11004163 + ... + 11008805.

It is an arithmetic number, because the mean of its divisors is an integer number (2492388360).

Almost surely, 2^51103105212 is an apocalyptic number.

It is an amenable number.

51103105212 is an abundant number, since it is smaller than the sum of its proper divisors (68531536068).

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

51103105212 is a wasteful number, since it uses less digits than its factorization.

51103105212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7482 (or 7480 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 51103105212 its reverse (21250130115), we get a palindrome (72353235327).

The spelling of 51103105212 in words is "fifty-one billion, one hundred three million, one hundred five thousand, two hundred twelve".