51010420211 has 4 divisors (see below), whose sum is σ = 53228264592. Its totient is φ = 48792575832.

The previous prime is 51010420189. The next prime is 51010420229. The reversal of 51010420211 is 11202401015.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51010420211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51010420211.

It is not an unprimeable number, because it can be changed into a prime (51010425211) 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, 1108922156 + ... + 1108922201.

It is an arithmetic number, because the mean of its divisors is an integer number (13307066148).

Almost surely, 2^51010420211 is an apocalyptic number.

51010420211 is a deficient number, since it is larger than the sum of its proper divisors (2217844381).

51010420211 is a wasteful number, since it uses less digits than its factorization.

51010420211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217844380.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 51010420211 its reverse (11202401015), we get a palindrome (62212821226).

The spelling of 51010420211 in words is "fifty-one billion, ten million, four hundred twenty thousand, two hundred eleven".