51556616 has 16 divisors (see below), whose sum is σ = 100872000. Its totient is φ = 24657424.

The previous prime is 51556607. The next prime is 51556621. The reversal of 51556616 is 61665515.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139916 + ... + 140283.

It is an arithmetic number, because the mean of its divisors is an integer number (6304500).

Almost surely, 2^51556616 is an apocalyptic number.

It is an amenable number.

51556616 is a deficient number, since it is larger than the sum of its proper divisors (49315384).

51556616 is a wasteful number, since it uses less digits than its factorization.

51556616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280228 (or 280224 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 51556616 is about 7180.2935873124. The cubic root of 51556616 is about 372.1872299110.

The spelling of 51556616 in words is "fifty-one million, five hundred fifty-six thousand, six hundred sixteen".