51300280 has 16 divisors (see below), whose sum is σ = 115425720. Its totient is φ = 20520096.

The previous prime is 51300211. The next prime is 51300289. The reversal of 51300280 is 8200315.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51300289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641214 + ... + 641293.

Almost surely, 2^51300280 is an apocalyptic number.

It is an amenable number.

51300280 is an abundant number, since it is smaller than the sum of its proper divisors (64125440).

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

51300280 is a wasteful number, since it uses less digits than its factorization.

51300280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282518 (or 1282514 counting only the distinct ones).

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

The square root of 51300280 is about 7162.4213782770. The cubic root of 51300280 is about 371.5693749062.

Adding to 51300280 its reverse (8200315), we get a palindrome (59500595).

The spelling of 51300280 in words is "fifty-one million, three hundred thousand, two hundred eighty".