201550885 has 4 divisors (see below), whose sum is σ = 241861068. Its totient is φ = 161240704.

The previous prime is 201550873. The next prime is 201550901. The reversal of 201550885 is 588055102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24740676 + 176810209 = 4974^2 + 13297^2 .

It is a cyclic number.

It is not a de Polignac number, because 201550885 - 2²⁵ = 167996453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201550885.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 20155084 + ... + 20155093.

It is an arithmetic number, because the mean of its divisors is an integer number (60465267).

Almost surely, 2^201550885 is an apocalyptic number.

It is an amenable number.

201550885 is a deficient number, since it is larger than the sum of its proper divisors (40310183).

201550885 is an equidigital number, since it uses as much as digits as its factorization.

201550885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40310182.

The product of its (nonzero) digits is 16000, while the sum is 34.

The square root of 201550885 is about 14196.8618011165. The cubic root of 201550885 is about 586.3112622623.

It can be divided in two parts, 2015 and 50885, that added together give a square (52900 = 230²).

The spelling of 201550885 in words is "two hundred one million, five hundred fifty thousand, eight hundred eighty-five".