51508641 has 8 divisors (see below), whose sum is σ = 68743840. Its totient is φ = 34306272.

The previous prime is 51508631. The next prime is 51508679. The reversal of 51508641 is 14680515.

51508641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51508641 - 2¹⁴ = 51492257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51508599 and 51508608.

It is not an unprimeable number, because it can be changed into a prime (51508631) 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 7 ways as a sum of consecutive naturals, for example, 4276 + ... + 11013.

It is an arithmetic number, because the mean of its divisors is an integer number (8592980).

Almost surely, 2^51508641 is an apocalyptic number.

It is an amenable number.

51508641 is a deficient number, since it is larger than the sum of its proper divisors (17235199).

51508641 is a wasteful number, since it uses less digits than its factorization.

51508641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16415.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 51508641 is about 7176.9520689496. The cubic root of 51508641 is about 372.0717502369.

The spelling of 51508641 in words is "fifty-one million, five hundred eight thousand, six hundred forty-one".