51122011 has 4 divisors (see below), whose sum is σ = 51139792. Its totient is φ = 51104232.

The previous prime is 51121979. The next prime is 51122021. The reversal of 51122011 is 11022115.

51122011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51122011 - 2⁵ = 51121979 is a prime.

It is a super-2 number, since 2×51122011² = 5226920017368242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51121982 and 51122000.

It is not an unprimeable number, because it can be changed into a prime (51122021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3480 + ... + 10693.

It is an arithmetic number, because the mean of its divisors is an integer number (12784948).

Almost surely, 2^51122011 is an apocalyptic number.

51122011 is a deficient number, since it is larger than the sum of its proper divisors (17781).

51122011 is a wasteful number, since it uses less digits than its factorization.

51122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17780.

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

The square root of 51122011 is about 7149.9658041140. The cubic root of 51122011 is about 371.1384729256.

Adding to 51122011 its reverse (11022115), we get a palindrome (62144126).

It can be divided in two parts, 511 and 22011, that added together give a palindrome (22522).

The spelling of 51122011 in words is "fifty-one million, one hundred twenty-two thousand, eleven".