51550005 has 16 divisors (see below), whose sum is σ = 88824960. Its totient is φ = 25378368.

The previous prime is 51549959. The next prime is 51550007. The reversal of 51550005 is 50005515.

51550005 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 51550005 - 2⁹ = 51549493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550007) 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, 131985 + ... + 132374.

It is an arithmetic number, because the mean of its divisors is an integer number (5551560).

Almost surely, 2^51550005 is an apocalyptic number.

It is an amenable number.

51550005 is a deficient number, since it is larger than the sum of its proper divisors (37274955).

51550005 is a wasteful number, since it uses less digits than its factorization.

51550005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264380.

The product of its (nonzero) digits is 625, while the sum is 21.

The square root of 51550005 is about 7179.8332153331. The cubic root of 51550005 is about 372.1713209605.

The spelling of 51550005 in words is "fifty-one million, five hundred fifty thousand, five".