51057680 has 40 divisors (see below), whose sum is σ = 119040000. Its totient is φ = 20366208.

The previous prime is 51057673. The next prime is 51057689. The reversal of 51057680 is 8675015.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (51057689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39281 + ... + 40559.

It is an arithmetic number, because the mean of its divisors is an integer number (2976000).

Almost surely, 2^51057680 is an apocalyptic number.

It is an amenable number.

51057680 is an abundant number, since it is smaller than the sum of its proper divisors (67982320).

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

51057680 is a wasteful number, since it uses less digits than its factorization.

51057680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791 (or 1785 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 51057680 is about 7145.4656951104. The cubic root of 51057680 is about 370.9827296325.

The spelling of 51057680 in words is "fifty-one million, fifty-seven thousand, six hundred eighty".