51006817 has 8 divisors (see below), whose sum is σ = 54107136. Its totient is φ = 47917632.

The previous prime is 51006803. The next prime is 51006821. The reversal of 51006817 is 71860015.

It is a happy number.

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 51006817 - 2⁷ = 51006689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51006217) 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, 7848 + ... + 12790.

It is an arithmetic number, because the mean of its divisors is an integer number (6763392).

Almost surely, 2^51006817 is an apocalyptic number.

It is an amenable number.

51006817 is a deficient number, since it is larger than the sum of its proper divisors (3100319).

51006817 is a wasteful number, since it uses less digits than its factorization.

51006817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5567.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 51006817 is about 7141.9056980613. The cubic root of 51006817 is about 370.8594993053.

The spelling of 51006817 in words is "fifty-one million, six thousand, eight hundred seventeen".