51975216 has 80 divisors (see below), whose sum is σ = 155704320. Its totient is φ = 16568640.

The previous prime is 51975191. The next prime is 51975227. The reversal of 51975216 is 61257915.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7321 + ... + 12551.

It is an arithmetic number, because the mean of its divisors is an integer number (1946304).

Almost surely, 2^51975216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51975216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77852160).

51975216 is an abundant number, since it is smaller than the sum of its proper divisors (103729104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51975216 is a wasteful number, since it uses less digits than its factorization.

51975216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271 (or 5259 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 51975216 is about 7209.3838849100. The cubic root of 51975216 is about 373.1918071836.

The spelling of 51975216 in words is "fifty-one million, nine hundred seventy-five thousand, two hundred sixteen".