51687702 has 48 divisors (see below), whose sum is σ = 122737680. Its totient is φ = 15590400.

The previous prime is 51687689. The next prime is 51687707. The reversal of 51687702 is 20778615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51687707) 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 23 ways as a sum of consecutive naturals, for example, 55174 + ... + 56102.

It is an arithmetic number, because the mean of its divisors is an integer number (2557035).

Almost surely, 2^51687702 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51687702, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61368840).

51687702 is an abundant number, since it is smaller than the sum of its proper divisors (71049978).

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

51687702 is a wasteful number, since it uses less digits than its factorization.

51687702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229 (or 1226 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 51687702 is about 7189.4159707170. The cubic root of 51687702 is about 372.5023995762.

The spelling of 51687702 in words is "fifty-one million, six hundred eighty-seven thousand, seven hundred two".