51086461 has 4 divisors (see below), whose sum is σ = 51102172. Its totient is φ = 51070752.

The previous prime is 51086449. The next prime is 51086467. The reversal of 51086461 is 16468015.

51086461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16468015 = 5 ⋅3293603.

It can be written as a sum of positive squares in 2 ways, for example, as 1454436 + 49632025 = 1206^2 + 7045^2 .

It is a cyclic number.

It is not a de Polignac number, because 51086461 - 2⁷ = 51086333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51086467) 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 3 ways as a sum of consecutive naturals, for example, 960 + ... + 10153.

It is an arithmetic number, because the mean of its divisors is an integer number (12775543).

Almost surely, 2^51086461 is an apocalyptic number.

It is an amenable number.

51086461 is a deficient number, since it is larger than the sum of its proper divisors (15711).

51086461 is a wasteful number, since it uses less digits than its factorization.

51086461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15710.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 51086461 is about 7147.4793458953. The cubic root of 51086461 is about 371.0524236748.

The spelling of 51086461 in words is "fifty-one million, eighty-six thousand, four hundred sixty-one".