51709708 has 12 divisors (see below), whose sum is σ = 91371280. Its totient is φ = 25603632.

The previous prime is 51709703. The next prime is 51709711. The reversal of 51709708 is 80790715.

It is not an unprimeable number, because it can be changed into a prime (51709703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62343 + ... + 63166.

Almost surely, 2^51709708 is an apocalyptic number.

It is an amenable number.

51709708 is a deficient number, since it is larger than the sum of its proper divisors (39661572).

51709708 is a wasteful number, since it uses less digits than its factorization.

51709708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125616 (or 125614 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 51709708 is about 7190.9462520589. The cubic root of 51709708 is about 372.5552562805. Note that the first 3 decimals are identical.

It can be divided in two parts, 5170 and 9708, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 51709708 in words is "fifty-one million, seven hundred nine thousand, seven hundred eight".