51168080 has 20 divisors (see below), whose sum is σ = 118965972. Its totient is φ = 20467200.

The previous prime is 51168071. The next prime is 51168097. The reversal of 51168080 is 8086115.

It can be written as a sum of positive squares in 2 ways, for example, as 25847056 + 25321024 = 5084^2 + 5032^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 319721 + ... + 319880.

Almost surely, 2^51168080 is an apocalyptic number.

It is an amenable number.

51168080 is an abundant number, since it is smaller than the sum of its proper divisors (67797892).

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

51168080 is a wasteful number, since it uses less digits than its factorization.

51168080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639614 (or 639608 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 51168080 is about 7153.1867024425. The cubic root of 51168080 is about 371.2499242330.

The spelling of 51168080 in words is "fifty-one million, one hundred sixty-eight thousand, eighty".