51255505 has 16 divisors (see below), whose sum is σ = 71622144. Its totient is φ = 34482240.

The previous prime is 51255439. The next prime is 51255517. The reversal of 51255505 is 50555215.

It is a happy number.

It is not a de Polignac number, because 51255505 - 2⁷ = 51255377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11961 + ... + 15670.

It is an arithmetic number, because the mean of its divisors is an integer number (4476384).

Almost surely, 2^51255505 is an apocalyptic number.

It is an amenable number.

51255505 is a deficient number, since it is larger than the sum of its proper divisors (20366639).

51255505 is a wasteful number, since it uses less digits than its factorization.

51255505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27696.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 51255505 is about 7159.2950071917. The cubic root of 51255505 is about 371.4612412444.

The spelling of 51255505 in words is "fifty-one million, two hundred fifty-five thousand, five hundred five".