201285806 has 4 divisors (see below), whose sum is σ = 301928712. Its totient is φ = 100642902.

The previous prime is 201285803. The next prime is 201285827. The reversal of 201285806 is 608582102.

201285806 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201285803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50321450 + ... + 50321453.

It is an arithmetic number, because the mean of its divisors is an integer number (75482178).

Almost surely, 2^201285806 is an apocalyptic number.

201285806 is a deficient number, since it is larger than the sum of its proper divisors (100642906).

201285806 is a wasteful number, since it uses less digits than its factorization.

201285806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100642905.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 201285806 is about 14187.5228986599. The cubic root of 201285806 is about 586.0541113392.

The spelling of 201285806 in words is "two hundred one million, two hundred eighty-five thousand, eight hundred six".