51006009 has 8 divisors (see below), whose sum is σ = 69666912. Its totient is φ = 33174560.

The previous prime is 51005993. The next prime is 51006023. The reversal of 51006009 is 90060015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51006009 - 2⁴ = 51005993 is a prime.

It is a super-2 number, since 2×51006009² = 5203225908216162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51006079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207219 + ... + 207464.

It is an arithmetic number, because the mean of its divisors is an integer number (8708364).

Almost surely, 2^51006009 is an apocalyptic number.

It is an amenable number.

51006009 is a deficient number, since it is larger than the sum of its proper divisors (18660903).

51006009 is a wasteful number, since it uses less digits than its factorization.

51006009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414727.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 51006009 is about 7141.8491303023. The cubic root of 51006009 is about 370.8575410308.

The spelling of 51006009 in words is "fifty-one million, six thousand, nine".