2185425855 has 12 divisors (see below), whose sum is σ = 3788071560. Its totient is φ = 1165560432.

The previous prime is 2185425821. The next prime is 2185425919. The reversal of 2185425855 is 5585245812.

2185425855 is a `hidden beast` number, since 2 + 1 + 8 + 542 + 58 + 55 = 666.

It is not a de Polignac number, because 2185425855 - 2¹⁸ = 2185163711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 48565019 = 2185425855 / (2 + 1 + 8 + 5 + 4 + 2 + 5 + 8 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 2185425855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24282465 + ... + 24282554.

It is an arithmetic number, because the mean of its divisors is an integer number (315672630).

Almost surely, 2^2185425855 is an apocalyptic number.

2185425855 is a deficient number, since it is larger than the sum of its proper divisors (1602645705).

2185425855 is a wasteful number, since it uses less digits than its factorization.

2185425855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48565030 (or 48565027 counting only the distinct ones).

The product of its digits is 640000, while the sum is 45.

The square root of 2185425855 is about 46748.5385333060. The cubic root of 2185425855 is about 1297.7131105509.

The spelling of 2185425855 in words is "two billion, one hundred eighty-five million, four hundred twenty-five thousand, eight hundred fifty-five".