51984511 has 4 divisors (see below), whose sum is σ = 52001872. Its totient is φ = 51967152.

The previous prime is 51984503. The next prime is 51984523. The reversal of 51984511 is 11548915.

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

It is a cyclic number.

It is not a de Polignac number, because 51984511 - 2³ = 51984503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51985511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2910 + ... + 10603.

It is an arithmetic number, because the mean of its divisors is an integer number (13000468).

Almost surely, 2^51984511 is an apocalyptic number.

51984511 is a deficient number, since it is larger than the sum of its proper divisors (17361).

51984511 is a wasteful number, since it uses less digits than its factorization.

51984511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17360.

The product of its digits is 7200, while the sum is 34.

The square root of 51984511 is about 7210.0285020241. The cubic root of 51984511 is about 373.2140524725.

The spelling of 51984511 in words is "fifty-one million, nine hundred eighty-four thousand, five hundred eleven".