51785616 has 40 divisors (see below), whose sum is σ = 135621280. Its totient is φ = 17024256.

The previous prime is 51785603. The next prime is 51785623. The reversal of 51785616 is 61658715.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3886 + ... + 10893.

It is an arithmetic number, because the mean of its divisors is an integer number (3390532).

Almost surely, 2^51785616 is an apocalyptic number.

It is an amenable number.

51785616 is an abundant number, since it is smaller than the sum of its proper divisors (83835664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51785616 is a wasteful number, since it uses less digits than its factorization.

51785616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14863 (or 14857 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 51785616 is about 7196.2223423127. Note that the first 3 decimals coincide. The cubic root of 51785616 is about 372.7374664095.

The spelling of 51785616 in words is "fifty-one million, seven hundred eighty-five thousand, six hundred sixteen".