51227442 has 54 divisors (see below), whose sum is σ = 129652029. Its totient is φ = 14575680.

The previous prime is 51227441. The next prime is 51227459. The reversal of 51227442 is 24472215.

51227442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47734281 + 3493161 = 6909^2 + 1869^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5061.

It is not an unprimeable number, because it can be changed into a prime (51227441) 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 26 ways as a sum of consecutive naturals, for example, 212442 + ... + 212682.

Almost surely, 2^51227442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51227442

51227442 is an abundant number, since it is smaller than the sum of its proper divisors (78424587).

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

51227442 is a wasteful number, since it uses less digits than its factorization.

51227442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 253 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 51227442 is about 7157.3348391702. The cubic root of 51227442 is about 371.3934357156.

Adding to 51227442 its reverse (24472215), we get a palindrome (75699657).

The spelling of 51227442 in words is "fifty-one million, two hundred twenty-seven thousand, four hundred forty-two".