51688508 has 12 divisors (see below), whose sum is σ = 91054992. Its totient is φ = 25672800.

The previous prime is 51688471. The next prime is 51688513. The reversal of 51688508 is 80588615.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42185 + ... + 43392.

It is an arithmetic number, because the mean of its divisors is an integer number (7587916).

Almost surely, 2^51688508 is an apocalyptic number.

It is an amenable number.

51688508 is a deficient number, since it is larger than the sum of its proper divisors (39366484).

51688508 is a wasteful number, since it uses less digits than its factorization.

51688508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85732 (or 85730 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 51688508 is about 7189.4720251212. The cubic root of 51688508 is about 372.5043357903.

The spelling of 51688508 in words is "fifty-one million, six hundred eighty-eight thousand, five hundred eight".