51982480 has 80 divisors (see below), whose sum is σ = 138830400. Its totient is φ = 17902080.

The previous prime is 51982477. The next prime is 51982487. The reversal of 51982480 is 8428915.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51982487) 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, 15166 + ... + 18274.

It is an arithmetic number, because the mean of its divisors is an integer number (1735380).

Almost surely, 2^51982480 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 51982480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69415200).

51982480 is an abundant number, since it is smaller than the sum of its proper divisors (86847920).

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

51982480 is a wasteful number, since it uses less digits than its factorization.

51982480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152 (or 3146 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 51982480 is about 7209.8876551580. The cubic root of 51982480 is about 373.2091920016.

The spelling of 51982480 in words is "fifty-one million, nine hundred eighty-two thousand, four hundred eighty".