201281885 has 8 divisors (see below), whose sum is σ = 276043776. Its totient is φ = 138021840.

The previous prime is 201281881. The next prime is 201281891. The reversal of 201281885 is 588182102.

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

It is not a de Polignac number, because 201281885 - 2² = 201281881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 5750911 = 201281885 / (2 + 0 + 1 + 2 + 8 + 1 + 8 + 8 + 5).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201281881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2875421 + ... + 2875490.

It is an arithmetic number, because the mean of its divisors is an integer number (34505472).

Almost surely, 2^201281885 is an apocalyptic number.

It is an amenable number.

201281885 is a deficient number, since it is larger than the sum of its proper divisors (74761891).

201281885 is an equidigital number, since it uses as much as digits as its factorization.

201281885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5750923.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 201281885 is about 14187.3847131880. The cubic root of 201281885 is about 586.0503059159.

The spelling of 201281885 in words is "two hundred one million, two hundred eighty-one thousand, eight hundred eighty-five".