51984905 has 16 divisors (see below), whose sum is σ = 71601024. Its totient is φ = 35493120.

The previous prime is 51984901. The next prime is 51984913. The reversal of 51984905 is 50948915.

It is a happy number.

51984905 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 51984905 - 2² = 51984901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51984901) 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, 5354 + ... + 11516.

It is an arithmetic number, because the mean of its divisors is an integer number (4475064).

Almost surely, 2^51984905 is an apocalyptic number.

It is an amenable number.

51984905 is a deficient number, since it is larger than the sum of its proper divisors (19616119).

51984905 is a wasteful number, since it uses less digits than its factorization.

51984905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6416.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 51984905 is about 7210.0558250266. The cubic root of 51984905 is about 373.2149953557.

The spelling of 51984905 in words is "fifty-one million, nine hundred eighty-four thousand, nine hundred five".