51130800 has 180 divisors, whose sum is σ = 202886320. Its totient is φ = 11681280.

The previous prime is 51130789. The next prime is 51130831. The reversal of 51130800 is 803115.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×51130800² = 5228717417280000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24186 + ... + 26214.

Almost surely, 2^51130800 is an apocalyptic number.

51130800 is a gapful number since it is divisible by the number (50) 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 51130800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101443160).

51130800 is an abundant number, since it is smaller than the sum of its proper divisors (151755520).

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

51130800 is a wasteful number, since it uses less digits than its factorization.

51130800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 51130800 is about 7150.5803960238. The cubic root of 51130800 is about 371.1597406669.

Adding to 51130800 its reverse (803115), we get a palindrome (51933915).

The spelling of 51130800 in words is "fifty-one million, one hundred thirty thousand, eight hundred".