51508005 has 16 divisors (see below), whose sum is σ = 84167424. Its totient is φ = 26886080.

The previous prime is 51508001. The next prime is 51508007. The reversal of 51508005 is 50080515.

51508005 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 51508005 - 2² = 51508001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51508001) 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, 35826 + ... + 37235.

It is an arithmetic number, because the mean of its divisors is an integer number (5260464).

Almost surely, 2^51508005 is an apocalyptic number.

It is an amenable number.

51508005 is a deficient number, since it is larger than the sum of its proper divisors (32659419).

51508005 is a wasteful number, since it uses less digits than its factorization.

51508005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73116.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 51508005 is about 7176.9077603101. The cubic root of 51508005 is about 372.0702188524.

The spelling of 51508005 in words is "fifty-one million, five hundred eight thousand, five".