51256280 has 16 divisors (see below), whose sum is σ = 115326720. Its totient is φ = 20502496.

The previous prime is 51256279. The next prime is 51256297. The reversal of 51256280 is 8265215.

51256280 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 3 ways as a sum of consecutive naturals, for example, 640664 + ... + 640743.

It is an arithmetic number, because the mean of its divisors is an integer number (7207920).

Almost surely, 2^51256280 is an apocalyptic number.

It is an amenable number.

51256280 is an abundant number, since it is smaller than the sum of its proper divisors (64070440).

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

51256280 is a wasteful number, since it uses less digits than its factorization.

51256280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281418 (or 1281414 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 51256280 is about 7159.3491324282. The cubic root of 51256280 is about 371.4631134402.

The spelling of 51256280 in words is "fifty-one million, two hundred fifty-six thousand, two hundred eighty".