51171616 has 24 divisors (see below), whose sum is σ = 100913904. Its totient is φ = 25542720.

The previous prime is 51171583. The next prime is 51171691. The reversal of 51171616 is 61617115.

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, 27351 + ... + 29161.

It is an arithmetic number, because the mean of its divisors is an integer number (4204746).

Almost surely, 2^51171616 is an apocalyptic number.

It is an amenable number.

51171616 is a deficient number, since it is larger than the sum of its proper divisors (49742288).

51171616 is a wasteful number, since it uses less digits than its factorization.

51171616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704 (or 2696 counting only the distinct ones).

The product of its digits is 1260, while the sum is 28.

The square root of 51171616 is about 7153.4338607413. The cubic root of 51171616 is about 371.2584758501.

It can be divided in two parts, 511 and 71616, that added together give a palindrome (72127).

The spelling of 51171616 in words is "fifty-one million, one hundred seventy-one thousand, six hundred sixteen".