51226560 has 504 divisors, whose sum is σ = 231068880. Its totient is φ = 10644480.

The previous prime is 51226529. The next prime is 51226561. The reversal of 51226560 is 6562215.

51226560 is a `hidden beast` number, since 5 + 1 + 2 + 2 + 656 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51226561) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4656955 + ... + 4656965.

It is an arithmetic number, because the mean of its divisors is an integer number (458470).

Almost surely, 2^51226560 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 51226560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115534440).

51226560 is an abundant number, since it is smaller than the sum of its proper divisors (179842320).

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

51226560 is a wasteful number, since it uses less digits than its factorization.

51226560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 51226560 is about 7157.2732237913. The cubic root of 51226560 is about 371.3913042350.

Adding to 51226560 its reverse (6562215), we get a palindrome (57788775).

It can be divided in two parts, 512 and 26560, that added together give a palindrome (27072).

The spelling of 51226560 in words is "fifty-one million, two hundred twenty-six thousand, five hundred sixty".