51800060 has 48 divisors (see below), whose sum is σ = 117948096. Its totient is φ = 18995712.

The previous prime is 51800057. The next prime is 51800069. The reversal of 51800060 is 6000815.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51800069) 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, 42824 + ... + 44016.

It is an arithmetic number, because the mean of its divisors is an integer number (2457252).

Almost surely, 2^51800060 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 51800060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58974048).

51800060 is an abundant number, since it is smaller than the sum of its proper divisors (66148036).

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

51800060 is a wasteful number, since it uses less digits than its factorization.

51800060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 51800060 is about 7197.2258544525. The cubic root of 51800060 is about 372.7721177272.

Adding to 51800060 its reverse (6000815), we get a palindrome (57800875).

The spelling of 51800060 in words is "fifty-one million, eight hundred thousand, sixty".