51240455201 has 4 divisors (see below), whose sum is σ = 55182028692. Its totient is φ = 47298881712.

The previous prime is 51240455143. The next prime is 51240455237. The reversal of 51240455201 is 10255404215.

51240455201 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 8619265600 + 42621189601 = 92840^2 + 206449^2 .

It is a cyclic number.

It is not a de Polignac number, because 51240455201 - 2¹⁸ = 51240193057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51240451201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970786726 + ... + 1970786751.

It is an arithmetic number, because the mean of its divisors is an integer number (13795507173).

Almost surely, 2^51240455201 is an apocalyptic number.

It is an amenable number.

51240455201 is a deficient number, since it is larger than the sum of its proper divisors (3941573491).

51240455201 is a wasteful number, since it uses less digits than its factorization.

51240455201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941573490.

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 51240455201 its reverse (10255404215), we get a palindrome (61495859416).

The spelling of 51240455201 in words is "fifty-one billion, two hundred forty million, four hundred fifty-five thousand, two hundred one".