51943094172 has 18 divisors (see below), whose sum is σ = 131300599248. Its totient is φ = 17314364712.

The previous prime is 51943094171. The next prime is 51943094183. The reversal of 51943094172 is 27149034915.

51943094172 is a `hidden beast` number, since 519 + 4 + 30 + 94 + 17 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×51943094172² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51943094171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 721431828 + ... + 721431899.

It is an arithmetic number, because the mean of its divisors is an integer number (7294477736).

Almost surely, 2^51943094172 is an apocalyptic number.

It is an amenable number.

51943094172 is an abundant number, since it is smaller than the sum of its proper divisors (79357505076).

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

51943094172 is a wasteful number, since it uses less digits than its factorization.

51943094172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442863737 (or 1442863732 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 51943094172 in words is "fifty-one billion, nine hundred forty-three million, ninety-four thousand, one hundred seventy-two".