51016217 has 4 divisors (see below), whose sum is σ = 58304256. Its totient is φ = 43728180.

The previous prime is 51016193. The next prime is 51016219. The reversal of 51016217 is 71261015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51016217 - 2⁶ = 51016153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51016192 and 51016201.

It is not an unprimeable number, because it can be changed into a prime (51016219) 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 3 ways as a sum of consecutive naturals, for example, 3644009 + ... + 3644022.

It is an arithmetic number, because the mean of its divisors is an integer number (14576064).

Almost surely, 2^51016217 is an apocalyptic number.

It is an amenable number.

51016217 is a deficient number, since it is larger than the sum of its proper divisors (7288039).

51016217 is an equidigital number, since it uses as much as digits as its factorization.

51016217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7288038.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 51016217 is about 7142.5637554032. The cubic root of 51016217 is about 370.8822796928.

The spelling of 51016217 in words is "fifty-one million, sixteen thousand, two hundred seventeen".