51071655 has 32 divisors (see below), whose sum is σ = 88876224. Its totient is φ = 24938496.

The previous prime is 51071651. The next prime is 51071693. The reversal of 51071655 is 55617015.

51071655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51071655 - 2² = 51071651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51071651) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 6729 + ... + 12141.

It is an arithmetic number, because the mean of its divisors is an integer number (2777382).

Almost surely, 2^51071655 is an apocalyptic number.

51071655 is a deficient number, since it is larger than the sum of its proper divisors (37804569).

51071655 is a wasteful number, since it uses less digits than its factorization.

51071655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5475.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 51071655 is about 7146.4435210810. The cubic root of 51071655 is about 371.0165737783.

The spelling of 51071655 in words is "fifty-one million, seventy-one thousand, six hundred fifty-five".