51483680 has 48 divisors (see below), whose sum is σ = 122240664. Its totient is φ = 20490240.

The previous prime is 51483661. The next prime is 51483697. The reversal of 51483680 is 8638415.

It can be written as a sum of positive squares in 4 ways, for example, as 32855824 + 18627856 = 5732^2 + 4316^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51483680.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36590 + ... + 37970.

Almost surely, 2^51483680 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 51483680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61120332).

51483680 is an abundant number, since it is smaller than the sum of its proper divisors (70756984).

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

51483680 is a wasteful number, since it uses less digits than its factorization.

51483680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629 (or 1621 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 51483680 is about 7175.2128888278. The cubic root of 51483680 is about 372.0116387463.

The spelling of 51483680 in words is "fifty-one million, four hundred eighty-three thousand, six hundred eighty".