53551555 has 16 divisors (see below), whose sum is σ = 66100320. Its totient is φ = 41626368.

The previous prime is 53551549. The next prime is 53551577. The reversal of 53551555 is 55515535.

It is a cyclic number.

It is not a de Polignac number, because 53551555 - 2⁵ = 53551523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53551555.

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, 49561 + ... + 50629.

It is an arithmetic number, because the mean of its divisors is an integer number (4131270).

Almost surely, 2^53551555 is an apocalyptic number.

53551555 is a deficient number, since it is larger than the sum of its proper divisors (12548765).

53551555 is a wasteful number, since it uses less digits than its factorization.

53551555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350.

The product of its digits is 46875, while the sum is 34.

The square root of 53551555 is about 7317.8927977936. The cubic root of 53551555 is about 376.9270990664.

The spelling of 53551555 in words is "fifty-three million, five hundred fifty-one thousand, five hundred fifty-five".