51688326 has 16 divisors (see below), whose sum is σ = 103523328. Its totient is φ = 17205000.

The previous prime is 51688271. The next prime is 51688339. The reversal of 51688326 is 62388615.

It is a happy number.

It is a Curzon number.

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, 1230 + ... + 10241.

It is an arithmetic number, because the mean of its divisors is an integer number (6470208).

Almost surely, 2^51688326 is an apocalyptic number.

51688326 is an abundant number, since it is smaller than the sum of its proper divisors (51835002).

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

51688326 is a wasteful number, since it uses less digits than its factorization.

51688326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12227.

The product of its digits is 69120, while the sum is 39.

The square root of 51688326 is about 7189.4593677133. The cubic root of 51688326 is about 372.5038985824.

The spelling of 51688326 in words is "fifty-one million, six hundred eighty-eight thousand, three hundred twenty-six".