51206111 has 6 divisors (see below), whose sum is σ = 56284536. Its totient is φ = 46550900.

The previous prime is 51206101. The next prime is 51206117. The reversal of 51206111 is 11160215.

It is not a de Polignac number, because 51206111 - 2⁶ = 51206047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51206111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51206117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211475 + ... + 211716.

It is an arithmetic number, because the mean of its divisors is an integer number (9380756).

Almost surely, 2^51206111 is an apocalyptic number.

51206111 is a deficient number, since it is larger than the sum of its proper divisors (5078425).

51206111 is a wasteful number, since it uses less digits than its factorization.

51206111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423213 (or 423202 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 51206111 is about 7155.8445343649. The cubic root of 51206111 is about 371.3418794083.

Adding to 51206111 its reverse (11160215), we get a palindrome (62366326).

The spelling of 51206111 in words is "fifty-one million, two hundred six thousand, one hundred eleven".