51333121 has 4 divisors (see below), whose sum is σ = 58666432. Its totient is φ = 43999812.

The previous prime is 51333119. The next prime is 51333131. The reversal of 51333121 is 12133315.

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 51333121 - 2¹ = 51333119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51333131) 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, 3666645 + ... + 3666658.

It is an arithmetic number, because the mean of its divisors is an integer number (14666608).

Almost surely, 2^51333121 is an apocalyptic number.

It is an amenable number.

51333121 is a deficient number, since it is larger than the sum of its proper divisors (7333311).

51333121 is an equidigital number, since it uses as much as digits as its factorization.

51333121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333310.

The product of its digits is 270, while the sum is 19.

The square root of 51333121 is about 7164.7136020919. The cubic root of 51333121 is about 371.6486474224.

Adding to 51333121 its reverse (12133315), we get a palindrome (63466436).

The spelling of 51333121 in words is "fifty-one million, three hundred thirty-three thousand, one hundred twenty-one".