51520210112 has 28 divisors (see below), whose sum is σ = 116840477520. Its totient is φ = 22080089856.

The previous prime is 51520210111. The next prime is 51520210117. The reversal of 51520210112 is 21101202515.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (51520210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57499787 + ... + 57500682.

Almost surely, 2^51520210112 is an apocalyptic number.

It is an amenable number.

51520210112 is an abundant number, since it is smaller than the sum of its proper divisors (65320267408).

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

51520210112 is a wasteful number, since it uses less digits than its factorization.

51520210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115000488 (or 115000478 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 51520210112 its reverse (21101202515), we get a palindrome (72621412627).

The spelling of 51520210112 in words is "fifty-one billion, five hundred twenty million, two hundred ten thousand, one hundred twelve".