51285660 has 48 divisors (see below), whose sum is σ = 144316032. Its totient is φ = 13608000.

The previous prime is 51285631. The next prime is 51285673. The reversal of 51285660 is 6658215.

51285660 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10635 + ... + 14685.

It is an arithmetic number, because the mean of its divisors is an integer number (3006584).

Almost surely, 2^51285660 is an apocalyptic number.

It is an amenable number.

51285660 is an abundant number, since it is smaller than the sum of its proper divisors (93030372).

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

51285660 is a wasteful number, since it uses less digits than its factorization.

51285660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274 (or 4272 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 51285660 is about 7161.4007009802. The cubic root of 51285660 is about 371.5340738618.

The spelling of 51285660 in words is "fifty-one million, two hundred eighty-five thousand, six hundred sixty".