51086511 has 16 divisors (see below), whose sum is σ = 86496000. Its totient is φ = 29192184.

The previous prime is 51086501. The next prime is 51086549. The reversal of 51086511 is 11568015.

51086511 is a `hidden beast` number, since 5 + 1 + 0 + 8 + 651 + 1 = 666.

51086511 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 51086511 - 2¹¹ = 51084463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51086501) 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 15 ways as a sum of consecutive naturals, for example, 134961 + ... + 135338.

It is an arithmetic number, because the mean of its divisors is an integer number (5406000).

Almost surely, 2^51086511 is an apocalyptic number.

51086511 is a deficient number, since it is larger than the sum of its proper divisors (35409489).

51086511 is a wasteful number, since it uses less digits than its factorization.

51086511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270315 (or 270309 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 51086511 is about 7147.4828436310. The cubic root of 51086511 is about 371.0525447285.

The spelling of 51086511 in words is "fifty-one million, eighty-six thousand, five hundred eleven".