51533505 has 12 divisors (see below), whose sum is σ = 89324820. Its totient is φ = 27484512.

The previous prime is 51533497. The next prime is 51533507. The reversal of 51533505 is 50533515.

51533505 is a `hidden beast` number, since 5 + 153 + 3 + 505 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40564161 + 10969344 = 6369^2 + 3312^2 .

It is not a de Polignac number, because 51533505 - 2³ = 51533497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51533507) 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 11 ways as a sum of consecutive naturals, for example, 572550 + ... + 572639.

It is an arithmetic number, because the mean of its divisors is an integer number (7443735).

Almost surely, 2^51533505 is an apocalyptic number.

It is an amenable number.

51533505 is a deficient number, since it is larger than the sum of its proper divisors (37791315).

51533505 is a wasteful number, since it uses less digits than its factorization.

51533505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145200 (or 1145197 counting only the distinct ones).

The product of its (nonzero) digits is 5625, while the sum is 27.

The square root of 51533505 is about 7178.6840716109. The cubic root of 51533505 is about 372.1316088267.

The spelling of 51533505 in words is "fifty-one million, five hundred thirty-three thousand, five hundred five".