51220300 has 36 divisors (see below), whose sum is σ = 111539736. Its totient is φ = 20416000.

The previous prime is 51220291. The next prime is 51220307. The reversal of 51220300 is 302215.

51220300 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51220307) 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, 34575 + ... + 36025.

It is an arithmetic number, because the mean of its divisors is an integer number (3098326).

Almost surely, 2^51220300 is an apocalyptic number.

51220300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51220300 is an abundant number, since it is smaller than the sum of its proper divisors (60319436).

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

51220300 is a wasteful number, since it uses less digits than its factorization.

51220300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818 (or 1811 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 51220300 is about 7156.8358930466. The cubic root of 51220300 is about 371.3761753365.

Adding to 51220300 its reverse (302215), we get a palindrome (51522515).

The spelling of 51220300 in words is "fifty-one million, two hundred twenty thousand, three hundred".