51372133 has 4 divisors (see below), whose sum is σ = 53605728. Its totient is φ = 49138540.

The previous prime is 51372131. The next prime is 51372149. The reversal of 51372133 is 33127315.

51372133 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 51372133 - 2¹ = 51372131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51372098 and 51372107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51372131) 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, 1116763 + ... + 1116808.

It is an arithmetic number, because the mean of its divisors is an integer number (13401432).

Almost surely, 2^51372133 is an apocalyptic number.

It is an amenable number.

51372133 is a deficient number, since it is larger than the sum of its proper divisors (2233595).

51372133 is a wasteful number, since it uses less digits than its factorization.

51372133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233594.

The product of its digits is 1890, while the sum is 25.

The square root of 51372133 is about 7167.4355944089. The cubic root of 51372133 is about 371.7427717447.

Adding to 51372133 its reverse (33127315), we get a palindrome (84499448).

The spelling of 51372133 in words is "fifty-one million, three hundred seventy-two thousand, one hundred thirty-three".