51930919 has 4 divisors (see below), whose sum is σ = 51947896. Its totient is φ = 51913944.

The previous prime is 51930881. The next prime is 51930929. The reversal of 51930919 is 91903915.

51930919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51930919 is a prime.

It is a super-2 number, since 2×51930919² = 5393640696369122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51930929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2484 + ... + 10489.

It is an arithmetic number, because the mean of its divisors is an integer number (12986974).

Almost surely, 2^51930919 is an apocalyptic number.

51930919 is a deficient number, since it is larger than the sum of its proper divisors (16977).

51930919 is a wasteful number, since it uses less digits than its factorization.

51930919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16976.

The product of its (nonzero) digits is 10935, while the sum is 37.

The square root of 51930919 is about 7206.3110535141. The cubic root of 51930919 is about 373.0857567916.

The spelling of 51930919 in words is "fifty-one million, nine hundred thirty thousand, nine hundred nineteen".