51730686 has 24 divisors (see below), whose sum is σ = 128095344. Its totient is φ = 14780160.

The previous prime is 51730681. The next prime is 51730687. The reversal of 51730686 is 68603715.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51730686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51730681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205155 + ... + 205406.

It is an arithmetic number, because the mean of its divisors is an integer number (5337306).

Almost surely, 2^51730686 is an apocalyptic number.

51730686 is an abundant number, since it is smaller than the sum of its proper divisors (76364658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51730686 is a wasteful number, since it uses less digits than its factorization.

51730686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410576 (or 410573 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 51730686 is about 7192.4047438948. The cubic root of 51730686 is about 372.6056298488.

The spelling of 51730686 in words is "fifty-one million, seven hundred thirty thousand, six hundred eighty-six".