51528133 has 4 divisors (see below), whose sum is σ = 54240160. Its totient is φ = 48816108.

The previous prime is 51528109. The next prime is 51528149. The reversal of 51528133 is 33182515.

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 51528133 - 2⁵ = 51528101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51528163) 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, 1355985 + ... + 1356022.

It is an arithmetic number, because the mean of its divisors is an integer number (13560040).

Almost surely, 2^51528133 is an apocalyptic number.

It is an amenable number.

51528133 is a deficient number, since it is larger than the sum of its proper divisors (2712027).

51528133 is a wasteful number, since it uses less digits than its factorization.

51528133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712026.

The product of its digits is 3600, while the sum is 28.

The square root of 51528133 is about 7178.3098985764. The cubic root of 51528133 is about 372.1186776895.

The spelling of 51528133 in words is "fifty-one million, five hundred twenty-eight thousand, one hundred thirty-three".