51685339 has 8 divisors (see below), whose sum is σ = 56161280. Its totient is φ = 47385000.

The previous prime is 51685327. The next prime is 51685349. The reversal of 51685339 is 93358615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51685339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51685349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43287 + ... + 44464.

It is an arithmetic number, because the mean of its divisors is an integer number (7020160).

Almost surely, 2^51685339 is an apocalyptic number.

51685339 is a deficient number, since it is larger than the sum of its proper divisors (4475941).

51685339 is a wasteful number, since it uses less digits than its factorization.

51685339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87801.

The product of its digits is 97200, while the sum is 40.

The square root of 51685339 is about 7189.2516300377. The cubic root of 51685339 is about 372.4967229416.

The spelling of 51685339 in words is "fifty-one million, six hundred eighty-five thousand, three hundred thirty-nine".