51226281 has 12 divisors (see below), whose sum is σ = 74141808. Its totient is φ = 34082424.

The previous prime is 51226277. The next prime is 51226303. The reversal of 51226281 is 18262215.

It is a happy number.

51226281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51226281 - 2² = 51226277 is a prime.

It is a super-2 number, since 2×51226281² = 5248263730181922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51226211) 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, 735 + ... + 10148.

It is an arithmetic number, because the mean of its divisors is an integer number (6178484).

Almost surely, 2^51226281 is an apocalyptic number.

It is an amenable number.

51226281 is a deficient number, since it is larger than the sum of its proper divisors (22915527).

51226281 is a wasteful number, since it uses less digits than its factorization.

51226281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11412 (or 11409 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 51226281 is about 7157.2537331018. The cubic root of 51226281 is about 371.3906299861.

Adding to 51226281 its reverse (18262215), we get a palindrome (69488496).

The spelling of 51226281 in words is "fifty-one million, two hundred twenty-six thousand, two hundred eighty-one".