51404256 has 36 divisors (see below), whose sum is σ = 146181672. Its totient is φ = 17134656.

The previous prime is 51404251. The next prime is 51404267. The reversal of 51404256 is 65240415.

51404256 is a `hidden beast` number, since 5 + 1 + 404 + 256 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51404251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88956 + ... + 89531.

It is an arithmetic number, because the mean of its divisors is an integer number (4060602).

Almost surely, 2^51404256 is an apocalyptic number.

It is an amenable number.

51404256 is an abundant number, since it is smaller than the sum of its proper divisors (94777416).

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

51404256 is a wasteful number, since it uses less digits than its factorization.

51404256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178503 (or 178492 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 51404256 is about 7169.6761433136. The cubic root of 51404256 is about 371.8202391978.

The spelling of 51404256 in words is "fifty-one million, four hundred four thousand, two hundred fifty-six".