51872170052 has 12 divisors (see below), whose sum is σ = 91624674960. Its totient is φ = 25693691496.

The previous prime is 51872170037. The next prime is 51872170061. The reversal of 51872170052 is 25007127815.

It is a junction number, because it is equal to n+sod(n) for n = 51872169988 and 51872170015.

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, 60597902 + ... + 60598757.

It is an arithmetic number, because the mean of its divisors is an integer number (7635389580).

Almost surely, 2^51872170052 is an apocalyptic number.

It is an amenable number.

51872170052 is a deficient number, since it is larger than the sum of its proper divisors (39752504908).

51872170052 is a wasteful number, since it uses less digits than its factorization.

51872170052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121196770 (or 121196768 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 38.

Adding to 51872170052 its reverse (25007127815), we get a palindrome (76879297867).

The spelling of 51872170052 in words is "fifty-one billion, eight hundred seventy-two million, one hundred seventy thousand, fifty-two".