51686052 has 96 divisors (see below), whose sum is σ = 143990784. Its totient is φ = 14246400.

The previous prime is 51686039. The next prime is 51686053. The reversal of 51686052 is 25068615.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (51686053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69193 + ... + 69935.

It is an arithmetic number, because the mean of its divisors is an integer number (1499904).

Almost surely, 2^51686052 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51686052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71995392).

51686052 is an abundant number, since it is smaller than the sum of its proper divisors (92304732).

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

51686052 is a wasteful number, since it uses less digits than its factorization.

51686052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 51686052 is about 7189.3012177819. The cubic root of 51686052 is about 372.4984357996.

It can be divided in two parts, 516 and 86052, that added together give a palindrome (86568).

The spelling of 51686052 in words is "fifty-one million, six hundred eighty-six thousand, fifty-two".