51121844 has 12 divisors (see below), whose sum is σ = 89552064. Its totient is φ = 25535544.

The previous prime is 51121841. The next prime is 51121849. The reversal of 51121844 is 44812115.

It is a super-2 number, since 2×51121844² = 5226885867920672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51121841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382 + ... + 10205.

It is an arithmetic number, because the mean of its divisors is an integer number (7462672).

Almost surely, 2^51121844 is an apocalyptic number.

It is an amenable number.

51121844 is a deficient number, since it is larger than the sum of its proper divisors (38430220).

51121844 is a wasteful number, since it uses less digits than its factorization.

51121844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12694 (or 12692 counting only the distinct ones).

The product of its digits is 1280, while the sum is 26.

The square root of 51121844 is about 7149.9541257270. The cubic root of 51121844 is about 371.1380687931.

Adding to 51121844 its reverse (44812115), we get a palindrome (95933959).

The spelling of 51121844 in words is "fifty-one million, one hundred twenty-one thousand, eight hundred forty-four".