51516211 has 8 divisors (see below), whose sum is σ = 51955200. Its totient is φ = 51079560.

The previous prime is 51516187. The next prime is 51516221. The reversal of 51516211 is 11261515.

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 51516211 - 2⁷ = 51516083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51516221) 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, 104676 + ... + 105166.

It is an arithmetic number, because the mean of its divisors is an integer number (6494400).

Almost surely, 2^51516211 is an apocalyptic number.

51516211 is a deficient number, since it is larger than the sum of its proper divisors (438989).

51516211 is a wasteful number, since it uses less digits than its factorization.

51516211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169.

The product of its digits is 300, while the sum is 22.

The square root of 51516211 is about 7177.4794322241. The cubic root of 51516211 is about 372.0899765974.

Adding to 51516211 its reverse (11261515), we get a palindrome (62777726).

The spelling of 51516211 in words is "fifty-one million, five hundred sixteen thousand, two hundred eleven".