51004660 has 48 divisors (see below), whose sum is σ = 123338880. Its totient is φ = 17354880.

The previous prime is 51004643. The next prime is 51004661. The reversal of 51004660 is 6640015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51004661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18150 + ... + 20770.

It is an arithmetic number, because the mean of its divisors is an integer number (2569560).

Almost surely, 2^51004660 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 51004660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61669440).

51004660 is an abundant number, since it is smaller than the sum of its proper divisors (72334220).

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

51004660 is a wasteful number, since it uses less digits than its factorization.

51004660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776 (or 2774 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 51004660 is about 7141.7546863498. The cubic root of 51004660 is about 370.8542715386.

Adding to 51004660 its reverse (6640015), we get a palindrome (57644675).

The spelling of 51004660 in words is "fifty-one million, four thousand, six hundred sixty".