51210005 has 16 divisors (see below), whose sum is σ = 76616064. Its totient is φ = 31922880.

The previous prime is 51209999. The next prime is 51210013. The reversal of 51210005 is 50001215.

51210005 is nontrivially palindromic in base 6.

51210005 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 51210005 - 2⁶ = 51209941 is a prime.

It is a super-2 number, since 2×51210005² = 5244929224200050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 66122 + ... + 66891.

It is an arithmetic number, because the mean of its divisors is an integer number (4788504).

Almost surely, 2^51210005 is an apocalyptic number.

51210005 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51210005 is a deficient number, since it is larger than the sum of its proper divisors (25406059).

51210005 is a wasteful number, since it uses less digits than its factorization.

51210005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133036.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 51210005 is about 7156.1166144774. The cubic root of 51210005 is about 371.3512921430.

The spelling of 51210005 in words is "fifty-one million, two hundred ten thousand, five".