51620216 has 16 divisors (see below), whose sum is σ = 97053000. Its totient is φ = 25739424.

The previous prime is 51620209. The next prime is 51620227. The reversal of 51620216 is 61202615.

51620216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51620191 and 51620200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5666 + ... + 11633.

Almost surely, 2^51620216 is an apocalyptic number.

It is an amenable number.

51620216 is a deficient number, since it is larger than the sum of its proper divisors (45432784).

51620216 is a wasteful number, since it uses less digits than its factorization.

51620216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17678 (or 17674 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 51620216 is about 7184.7210105891. The cubic root of 51620216 is about 372.3402098309.

The spelling of 51620216 in words is "fifty-one million, six hundred twenty thousand, two hundred sixteen".