51127015820 has 24 divisors (see below), whose sum is σ = 107375536464. Its totient is φ = 20449129536.

The previous prime is 51127015799. The next prime is 51127015829. The reversal of 51127015820 is 2851072115.

It is a super-3 number, since 3×51127015820³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (51127015829) 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, 161762 + ... + 358358.

It is an arithmetic number, because the mean of its divisors is an integer number (4473980686).

Almost surely, 2^51127015820 is an apocalyptic number.

It is an amenable number.

51127015820 is an abundant number, since it is smaller than the sum of its proper divisors (56248520644).

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

51127015820 is a wasteful number, since it uses less digits than its factorization.

51127015820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209609 (or 209607 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 32.

Adding to 51127015820 its reverse (2851072115), we get a palindrome (53978087935).

The spelling of 51127015820 in words is "fifty-one billion, one hundred twenty-seven million, fifteen thousand, eight hundred twenty".