51700372172 has 12 divisors (see below), whose sum is σ = 92920939440. Its totient is φ = 25151532336.

The previous prime is 51700372159. The next prime is 51700372223. The reversal of 51700372172 is 27127300715.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174663272 + ... + 174663567.

It is an arithmetic number, because the mean of its divisors is an integer number (7743411620).

Almost surely, 2^51700372172 is an apocalyptic number.

It is an amenable number.

51700372172 is a deficient number, since it is larger than the sum of its proper divisors (41220567268).

51700372172 is a wasteful number, since it uses less digits than its factorization.

51700372172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349326880 (or 349326878 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 35.

Adding to 51700372172 its reverse (27127300715), we get a palindrome (78827672887).

The spelling of 51700372172 in words is "fifty-one billion, seven hundred million, three hundred seventy-two thousand, one hundred seventy-two".