51709808 has 10 divisors (see below), whose sum is σ = 100187784. Its totient is φ = 25854896.

The previous prime is 51709793. The next prime is 51709837. The reversal of 51709808 is 80890715.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1615916 + ... + 1615947.

Almost surely, 2^51709808 is an apocalyptic number.

It is an amenable number.

51709808 is a deficient number, since it is larger than the sum of its proper divisors (48477976).

51709808 is a wasteful number, since it uses less digits than its factorization.

51709808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231871 (or 3231865 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 51709808 is about 7190.9532052434. The cubic root of 51709808 is about 372.5554964385. Note that the first 3 decimals are identical.

The spelling of 51709808 in words is "fifty-one million, seven hundred nine thousand, eight hundred eight".