51555255 has 8 divisors (see below), whose sum is σ = 82488432. Its totient is φ = 27496128.

The previous prime is 51555253. The next prime is 51555289. The reversal of 51555255 is 55255515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51555255 - 2¹ = 51555253 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1718494 + ... + 1718523.

It is an arithmetic number, because the mean of its divisors is an integer number (10311054).

Almost surely, 2^51555255 is an apocalyptic number.

51555255 is a deficient number, since it is larger than the sum of its proper divisors (30933177).

51555255 is a wasteful number, since it uses less digits than its factorization.

51555255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437025.

The product of its digits is 31250, while the sum is 33.

The square root of 51555255 is about 7180.1988134034. The cubic root of 51555255 is about 372.1839548623.

The spelling of 51555255 in words is "fifty-one million, five hundred fifty-five thousand, two hundred fifty-five".