51887685 has 8 divisors (see below), whose sum is σ = 83020320. Its totient is φ = 27673424.

The previous prime is 51887669. The next prime is 51887687. The reversal of 51887685 is 58678815.

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

It is a cyclic number.

It is not a de Polignac number, because 51887685 - 2⁴ = 51887669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51887687) 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, 1729575 + ... + 1729604.

It is an arithmetic number, because the mean of its divisors is an integer number (10377540).

Almost surely, 2^51887685 is an apocalyptic number.

It is an amenable number.

51887685 is a deficient number, since it is larger than the sum of its proper divisors (31132635).

51887685 is a wasteful number, since it uses less digits than its factorization.

51887685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459187.

The product of its digits is 537600, while the sum is 48.

The square root of 51887685 is about 7203.3106971725. The cubic root of 51887685 is about 372.9821931330.

The spelling of 51887685 in words is "fifty-one million, eight hundred eighty-seven thousand, six hundred eighty-five".