51220688112 has 90 divisors (see below), whose sum is σ = 157563050736. Its totient is φ = 15521415360.

The previous prime is 51220688093. The next prime is 51220688117. The reversal of 51220688112 is 21188602215.

51220688112 is a `hidden beast` number, since 512 + 2 + 0 + 68 + 81 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51220688117) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 1452408 + ... + 1487255.

Almost surely, 2^51220688112 is an apocalyptic number.

It is an amenable number.

51220688112 is an abundant number, since it is smaller than the sum of its proper divisors (106342362624).

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

51220688112 is a wasteful number, since it uses less digits than its factorization.

51220688112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939699 (or 2939679 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The spelling of 51220688112 in words is "fifty-one billion, two hundred twenty million, six hundred eighty-eight thousand, one hundred twelve".