51218231041 has 4 divisors (see below), whose sum is σ = 51364988500. Its totient is φ = 51071473584.

The previous prime is 51218231039. The next prime is 51218231063. The reversal of 51218231041 is 14013281215.

51218231041 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 38026560016 + 13191671025 = 195004^2 + 114855^2 .

It is a cyclic number.

It is not a de Polignac number, because 51218231041 - 2¹ = 51218231039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51218231021) 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, 73378206 + ... + 73378903.

It is an arithmetic number, because the mean of its divisors is an integer number (12841247125).

Almost surely, 2^51218231041 is an apocalyptic number.

It is an amenable number.

51218231041 is a deficient number, since it is larger than the sum of its proper divisors (146757459).

51218231041 is a wasteful number, since it uses less digits than its factorization.

51218231041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146757458.

The product of its (nonzero) digits is 1920, while the sum is 28.

The spelling of 51218231041 in words is "fifty-one billion, two hundred eighteen million, two hundred thirty-one thousand, forty-one".