51984215 has 16 divisors (see below), whose sum is σ = 66225600. Its totient is φ = 39037440.

The previous prime is 51984197. The next prime is 51984217. The reversal of 51984215 is 51248915.

It is not a de Polignac number, because 51984215 - 2⁶ = 51984151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51984217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50405 + ... + 51425.

It is an arithmetic number, because the mean of its divisors is an integer number (4139100).

Almost surely, 2^51984215 is an apocalyptic number.

51984215 is a deficient number, since it is larger than the sum of its proper divisors (14241385).

51984215 is a wasteful number, since it uses less digits than its factorization.

51984215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642.

The product of its digits is 14400, while the sum is 35.

The square root of 51984215 is about 7210.0079750303. The cubic root of 51984215 is about 373.2133441104.

The spelling of 51984215 in words is "fifty-one million, nine hundred eighty-four thousand, two hundred fifteen".