51220406041 has 6 divisors (see below), whose sum is σ = 59582921370. Its totient is φ = 43903205136.

The previous prime is 51220406023. The next prime is 51220406161. The reversal of 51220406041 is 14060402215.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50663257225 + 557148816 = 225085^2 + 23604^2 .

It is not a de Polignac number, because 51220406041 - 2⁹ = 51220405529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51220405997 and 51220406015.

It is not an unprimeable number, because it can be changed into a prime (51220406011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 522657156 + ... + 522657253.

It is an arithmetic number, because the mean of its divisors is an integer number (9930486895).

Almost surely, 2^51220406041 is an apocalyptic number.

It is an amenable number.

51220406041 is a deficient number, since it is larger than the sum of its proper divisors (8362515329).

51220406041 is a wasteful number, since it uses less digits than its factorization.

51220406041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045314423 (or 1045314416 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 51220406041 its reverse (14060402215), we get a palindrome (65280808256).

The spelling of 51220406041 in words is "fifty-one billion, two hundred twenty million, four hundred six thousand, forty-one".