51803020 has 36 divisors (see below), whose sum is σ = 110899152. Its totient is φ = 20322400.

The previous prime is 51803009. The next prime is 51803023. The reversal of 51803020 is 2030815.

It is a happy number.

51803020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51803020² = 5367105762240800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51803023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271125 + ... + 271315.

It is an arithmetic number, because the mean of its divisors is an integer number (3080532).

Almost surely, 2^51803020 is an apocalyptic number.

It is an amenable number.

51803020 is an abundant number, since it is smaller than the sum of its proper divisors (59096132).

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

51803020 is a wasteful number, since it uses less digits than its factorization.

51803020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 51803020 is about 7197.4314863012. The cubic root of 51803020 is about 372.7792180050.

Adding to 51803020 its reverse (2030815), we get a palindrome (53833835).

The spelling of 51803020 in words is "fifty-one million, eight hundred three thousand, twenty".