51102211 has 2 divisors, whose sum is σ = 51102212. Its totient is φ = 51102210.

The previous prime is 51102209. The next prime is 51102223. The reversal of 51102211 is 11220115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51102211 - 2¹ = 51102209 is a prime.

It is a super-2 number, since 2×51102211² = 5222871938177042, which contains 22 as substring.

Together with 51102209, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 51102191 and 51102200.

It is not a weakly prime, because it can be changed into another prime (51102281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25551105 + 25551106.

It is an arithmetic number, because the mean of its divisors is an integer number (25551106).

Almost surely, 2^51102211 is an apocalyptic number.

51102211 is a deficient number, since it is larger than the sum of its proper divisors (1).

51102211 is an equidigital number, since it uses as much as digits as its factorization.

51102211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 51102211 is about 7148.5810480123. The cubic root of 51102211 is about 371.0905516842.

Adding to 51102211 its reverse (11220115), we get a palindrome (62322326).

The spelling of 51102211 in words is "fifty-one million, one hundred two thousand, two hundred eleven".