51584521 has 4 divisors (see below), whose sum is σ = 52682112. Its totient is φ = 50486932.

The previous prime is 51584513. The next prime is 51584531. The reversal of 51584521 is 12548515.

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 51584521 - 2³ = 51584513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51584531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548725 + ... + 548818.

It is an arithmetic number, because the mean of its divisors is an integer number (13170528).

Almost surely, 2^51584521 is an apocalyptic number.

It is an amenable number.

51584521 is a deficient number, since it is larger than the sum of its proper divisors (1097591).

51584521 is a wasteful number, since it uses less digits than its factorization.

51584521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097590.

The product of its digits is 8000, while the sum is 31.

The square root of 51584521 is about 7182.2364901192. The cubic root of 51584521 is about 372.2543665350.

The spelling of 51584521 in words is "fifty-one million, five hundred eighty-four thousand, five hundred twenty-one".