51227280 has 180 divisors, whose sum is σ = 186732468. Its totient is φ = 12579840.

The previous prime is 51227261. The next prime is 51227291. The reversal of 51227280 is 8272215.

51227280 is a `hidden beast` number, since 512 + 2 + 72 + 80 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 27373824 + 23853456 = 5232^2 + 4884^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 121470 + ... + 121890.

Almost surely, 2^51227280 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 51227280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93366234).

51227280 is an abundant number, since it is smaller than the sum of its proper divisors (135505188).

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

51227280 is a wasteful number, since it uses less digits than its factorization.

51227280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 51227280 is about 7157.3235220996. The cubic root of 51227280 is about 371.3930442210.

Adding to 51227280 its reverse (8272215), we get a palindrome (59499495).

The spelling of 51227280 in words is "fifty-one million, two hundred twenty-seven thousand, two hundred eighty".