51321133 has 4 divisors (see below), whose sum is σ = 52413120. Its totient is φ = 50229148.

The previous prime is 51321131. The next prime is 51321157. The reversal of 51321133 is 33112315.

51321133 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, 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 51321133 - 2¹ = 51321131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51321133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51321131) 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, 545923 + ... + 546016.

It is an arithmetic number, because the mean of its divisors is an integer number (13103280).

Almost surely, 2^51321133 is an apocalyptic number.

It is an amenable number.

51321133 is a deficient number, since it is larger than the sum of its proper divisors (1091987).

51321133 is a wasteful number, since it uses less digits than its factorization.

51321133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091986.

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

The square root of 51321133 is about 7163.8769531588. The cubic root of 51321133 is about 371.6197143751.

Adding to 51321133 its reverse (33112315), we get a palindrome (84433448).

The spelling of 51321133 in words is "fifty-one million, three hundred twenty-one thousand, one hundred thirty-three".