51052121 has 4 divisors (see below), whose sum is σ = 51123072. Its totient is φ = 50981172.

The previous prime is 51052103. The next prime is 51052123. The reversal of 51052121 is 12125015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51052121 - 2¹⁰ = 51051097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51052121.

It is not an unprimeable number, because it can be changed into a prime (51052123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34385 + ... + 35838.

It is an arithmetic number, because the mean of its divisors is an integer number (12780768).

Almost surely, 2^51052121 is an apocalyptic number.

It is an amenable number.

51052121 is a deficient number, since it is larger than the sum of its proper divisors (70951).

51052121 is an equidigital number, since it uses as much as digits as its factorization.

51052121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70950.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51052121 is about 7145.0766965793. The cubic root of 51052121 is about 370.9692653320.

Adding to 51052121 its reverse (12125015), we get a palindrome (63177136).

The spelling of 51052121 in words is "fifty-one million, fifty-two thousand, one hundred twenty-one".