51056660 has 12 divisors (see below), whose sum is σ = 107219028. Its totient is φ = 20422656.

The previous prime is 51056657. The next prime is 51056669. The reversal of 51056660 is 6665015.

It can be written as a sum of positive squares in 2 ways, for example, as 31854736 + 19201924 = 5644^2 + 4382^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51056669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276397 + ... + 1276436.

It is an arithmetic number, because the mean of its divisors is an integer number (8934919).

Almost surely, 2^51056660 is an apocalyptic number.

It is an amenable number.

51056660 is an abundant number, since it is smaller than the sum of its proper divisors (56162368).

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

51056660 is a wasteful number, since it uses less digits than its factorization.

51056660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552842 (or 2552840 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 51056660 is about 7145.3943208195. The cubic root of 51056660 is about 370.9802591918.

The spelling of 51056660 in words is "fifty-one million, fifty-six thousand, six hundred sixty".