51480684 has 60 divisors (see below), whose sum is σ = 139246800. Its totient is φ = 16565472.

The previous prime is 51480661. The next prime is 51480697. The reversal of 51480684 is 48608415.

51480684 is a `hidden beast` number, since 514 + 80 + 68 + 4 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6657 + ... + 12135.

It is an arithmetic number, because the mean of its divisors is an integer number (2320780).

Almost surely, 2^51480684 is an apocalyptic number.

51480684 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51480684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69623400).

51480684 is an abundant number, since it is smaller than the sum of its proper divisors (87766116).

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

51480684 is a wasteful number, since it uses less digits than its factorization.

51480684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5524 (or 5513 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 51480684 is about 7175.0041114971. The cubic root of 51480684 is about 372.0044224240.

The spelling of 51480684 in words is "fifty-one million, four hundred eighty thousand, six hundred eighty-four".