51055505 has 16 divisors (see below), whose sum is σ = 65221200. Its totient is φ = 38234112.

The previous prime is 51055493. The next prime is 51055507. The reversal of 51055505 is 50555015.

It can be written as a sum of positive squares in 8 ways, for example, as 1507984 + 49547521 = 1228^2 + 7039^2 .

It is a cyclic number.

It is not a de Polignac number, because 51055505 - 2⁶ = 51055441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51055507) 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 15 ways as a sum of consecutive naturals, for example, 15221 + ... + 18269.

It is an arithmetic number, because the mean of its divisors is an integer number (4076325).

Almost surely, 2^51055505 is an apocalyptic number.

It is an amenable number.

51055505 is a deficient number, since it is larger than the sum of its proper divisors (14165695).

51055505 is a wasteful number, since it uses less digits than its factorization.

51055505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268.

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 51055505 is about 7145.3134990706. The cubic root of 51055505 is about 370.9774617414.

The spelling of 51055505 in words is "fifty-one million, fifty-five thousand, five hundred five".