51113355211 has 2 divisors, whose sum is σ = 51113355212. Its totient is φ = 51113355210.

The previous prime is 51113355199. The next prime is 51113355217. The reversal of 51113355211 is 11255331115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51113355211 is a prime.

It is a super-2 number, since 2×51113355211² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51113355211.

It is not a weakly prime, because it can be changed into another prime (51113355217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25556677605 + 25556677606.

It is an arithmetic number, because the mean of its divisors is an integer number (25556677606).

Almost surely, 2^51113355211 is an apocalyptic number.

51113355211 is a deficient number, since it is larger than the sum of its proper divisors (1).

51113355211 is an equidigital number, since it uses as much as digits as its factorization.

51113355211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 28.

Adding to 51113355211 its reverse (11255331115), we get a palindrome (62368686326).

The spelling of 51113355211 in words is "fifty-one billion, one hundred thirteen million, three hundred fifty-five thousand, two hundred eleven".