51004620 has 96 divisors (see below), whose sum is σ = 164203200. Its totient is φ = 13128192.

The previous prime is 51004619. The next prime is 51004627. The reversal of 51004620 is 2640015.

It is a happy number.

It is a super-3 number, since 3×51004620³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51004593 and 51004602.

It is not an unprimeable number, because it can be changed into a prime (51004627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14032 + ... + 17288.

It is an arithmetic number, because the mean of its divisors is an integer number (1710450).

Almost surely, 2^51004620 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 51004620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82101600).

51004620 is an abundant number, since it is smaller than the sum of its proper divisors (113198580).

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

51004620 is a wasteful number, since it uses less digits than its factorization.

51004620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304 (or 3296 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51004620 is about 7141.7518859171. The cubic root of 51004620 is about 370.8541745921.

Adding to 51004620 its reverse (2640015), we get a palindrome (53644635).

The spelling of 51004620 in words is "fifty-one million, four thousand, six hundred twenty".