51685752 has 32 divisors (see below), whose sum is σ = 130988880. Its totient is φ = 16992000.

The previous prime is 51685741. The next prime is 51685769. The reversal of 51685752 is 25758615.

It is a self number, because there is not a number n which added to its sum of digits gives 51685752.

It is a congruent number.

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, 12999 + ... + 16502.

Almost surely, 2^51685752 is an apocalyptic number.

It is an amenable number.

51685752 is an abundant number, since it is smaller than the sum of its proper divisors (79303128).

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

51685752 is a wasteful number, since it uses less digits than its factorization.

51685752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29583 (or 29579 counting only the distinct ones).

The product of its digits is 84000, while the sum is 39.

The square root of 51685752 is about 7189.2803534151. The cubic root of 51685752 is about 372.4977151039.

It can be divided in two parts, 516 and 85752, that added together give a palindrome (86268).

The spelling of 51685752 in words is "fifty-one million, six hundred eighty-five thousand, seven hundred fifty-two".