51930885 has 16 divisors (see below), whose sum is σ = 85022784. Its totient is φ = 27052032.

The previous prime is 51930881. The next prime is 51930929. The reversal of 51930885 is 58803915.

It is not a de Polignac number, because 51930885 - 2² = 51930881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51930881) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 39612 + ... + 40901.

It is an arithmetic number, because the mean of its divisors is an integer number (5313924).

Almost surely, 2^51930885 is an apocalyptic number.

It is an amenable number.

51930885 is a deficient number, since it is larger than the sum of its proper divisors (33091899).

51930885 is a wasteful number, since it uses less digits than its factorization.

51930885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80564.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 51930885 is about 7206.3086944704. The cubic root of 51930885 is about 373.0856753699.

The spelling of 51930885 in words is "fifty-one million, nine hundred thirty thousand, eight hundred eighty-five".