51256506 has 16 divisors (see below), whose sum is σ = 117157824. Its totient is φ = 14644704.

The previous prime is 51256483. The next prime is 51256511. The reversal of 51256506 is 60565215.

51256506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 610155 + ... + 610238.

It is an arithmetic number, because the mean of its divisors is an integer number (7322364).

Almost surely, 2^51256506 is an apocalyptic number.

51256506 is an abundant number, since it is smaller than the sum of its proper divisors (65901318).

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

51256506 is a wasteful number, since it uses less digits than its factorization.

51256506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220405.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 51256506 is about 7159.3649159685. The cubic root of 51256506 is about 371.4636593930.

The spelling of 51256506 in words is "fifty-one million, two hundred fifty-six thousand, five hundred six".