51998216 has 16 divisors (see below), whose sum is σ = 101736000. Its totient is φ = 24868624.

The previous prime is 51998203. The next prime is 51998227. The reversal of 51998216 is 61289915.

It is a happy number.

It is an unprimeable number.

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, 141116 + ... + 141483.

It is an arithmetic number, because the mean of its divisors is an integer number (6358500).

Almost surely, 2^51998216 is an apocalyptic number.

It is an amenable number.

51998216 is a deficient number, since it is larger than the sum of its proper divisors (49737784).

51998216 is a wasteful number, since it uses less digits than its factorization.

51998216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282628 (or 282624 counting only the distinct ones).

The product of its digits is 38880, while the sum is 41.

The square root of 51998216 is about 7210.9788517233. The cubic root of 51998216 is about 373.2468471714.

The spelling of 51998216 in words is "fifty-one million, nine hundred ninety-eight thousand, two hundred sixteen".