51486129 has 12 divisors (see below), whose sum is σ = 76379316. Its totient is φ = 33396192.

The previous prime is 51486101. The next prime is 51486137. The reversal of 51486129 is 92168415.

51486129 is a `hidden beast` number, since 51 + 486 + 129 = 666.

51486129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 24206400 + 27279729 = 4920^2 + 5223^2 .

It is not a de Polignac number, because 51486129 - 2⁹ = 51485617 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51486093 and 51486102.

It is not an unprimeable number, because it can be changed into a prime (51486199) 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 11 ways as a sum of consecutive naturals, for example, 76974 + ... + 77639.

It is an arithmetic number, because the mean of its divisors is an integer number (6364943).

Almost surely, 2^51486129 is an apocalyptic number.

It is an amenable number.

51486129 is a deficient number, since it is larger than the sum of its proper divisors (24893187).

51486129 is a wasteful number, since it uses less digits than its factorization.

51486129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154656 (or 154653 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 51486129 is about 7175.3835437557. The cubic root of 51486129 is about 372.0175373279.

It can be divided in two parts, 51486 and 129, that added together give a palindrome (51615).

The spelling of 51486129 in words is "fifty-one million, four hundred eighty-six thousand, one hundred twenty-nine".