51871717172 has 48 divisors (see below), whose sum is σ = 101567499264. Its totient is φ = 22975932000.

The previous prime is 51871717147. The next prime is 51871717207. The reversal of 51871717172 is 27171717815.

It is a happy number.

51871717172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 783647 + ... + 847257.

It is an arithmetic number, because the mean of its divisors is an integer number (2115989568).

Almost surely, 2^51871717172 is an apocalyptic number.

It is an amenable number.

51871717172 is a deficient number, since it is larger than the sum of its proper divisors (49695782092).

51871717172 is a wasteful number, since it uses less digits than its factorization.

51871717172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64100 (or 64098 counting only the distinct ones).

The product of its digits is 192080, while the sum is 47.

The spelling of 51871717172 in words is "fifty-one billion, eight hundred seventy-one million, seven hundred seventeen thousand, one hundred seventy-two".