51205241 has 4 divisors (see below), whose sum is σ = 54217332. Its totient is φ = 48193152.

The previous prime is 51205229. The next prime is 51205249. The reversal of 51205241 is 14250215.

51205241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33396841 + 17808400 = 5779^2 + 4220^2 .

It is a cyclic number.

It is not a de Polignac number, because 51205241 - 2⁶ = 51205177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51205249) 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 3 ways as a sum of consecutive naturals, for example, 1506020 + ... + 1506053.

It is an arithmetic number, because the mean of its divisors is an integer number (13554333).

Almost surely, 2^51205241 is an apocalyptic number.

It is an amenable number.

51205241 is a deficient number, since it is larger than the sum of its proper divisors (3012091).

51205241 is a wasteful number, since it uses less digits than its factorization.

51205241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012090.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 51205241 is about 7155.7837446362. The cubic root of 51205241 is about 371.3397763437.

Adding to 51205241 its reverse (14250215), we get a palindrome (65455456).

The spelling of 51205241 in words is "fifty-one million, two hundred five thousand, two hundred forty-one".