51111352212 has 24 divisors (see below), whose sum is σ = 119380192512. Its totient is φ = 17019921600.

The previous prime is 51111352153. The next prime is 51111352231. The reversal of 51111352212 is 21225311115.

It is a super-2 number, since 2×51111352212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2137089 + ... + 2160872.

It is an arithmetic number, because the mean of its divisors is an integer number (4974174688).

Almost surely, 2^51111352212 is an apocalyptic number.

It is an amenable number.

51111352212 is an abundant number, since it is smaller than the sum of its proper divisors (68268840300).

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

51111352212 is a wasteful number, since it uses less digits than its factorization.

51111352212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298959 (or 4298957 counting only the distinct ones).

The product of its digits is 600, while the sum is 24.

Adding to 51111352212 its reverse (21225311115), we get a palindrome (72336663327).

The spelling of 51111352212 in words is "fifty-one billion, one hundred eleven million, three hundred fifty-two thousand, two hundred twelve".