51184639 has 8 divisors (see below), whose sum is σ = 55939968. Its totient is φ = 46446360.

The previous prime is 51184633. The next prime is 51184649. The reversal of 51184639 is 93648115.

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 51184639 - 2³ = 51184631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51184598 and 51184607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51184631) 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, 2494 + ... + 10420.

It is an arithmetic number, because the mean of its divisors is an integer number (6992496).

Almost surely, 2^51184639 is an apocalyptic number.

51184639 is a deficient number, since it is larger than the sum of its proper divisors (4755329).

51184639 is a wasteful number, since it uses less digits than its factorization.

51184639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8525.

The product of its digits is 25920, while the sum is 37.

The square root of 51184639 is about 7154.3440649720. The cubic root of 51184639 is about 371.2899678465.

The spelling of 51184639 in words is "fifty-one million, one hundred eighty-four thousand, six hundred thirty-nine".