201715705 has 4 divisors (see below), whose sum is σ = 242058852. Its totient is φ = 161372560.

The previous prime is 201715699. The next prime is 201715711. The reversal of 201715705 is 507517102.

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

It is an interprime number because it is at equal distance from previous prime (201715699) and next prime (201715711).

It can be written as a sum of positive squares in 2 ways, for example, as 34892649 + 166823056 = 5907^2 + 12916^2 .

It is not a de Polignac number, because 201715705 - 2³ = 201715697 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 20171566 + ... + 20171575.

It is an arithmetic number, because the mean of its divisors is an integer number (60514713).

Almost surely, 2^201715705 is an apocalyptic number.

It is an amenable number.

201715705 is a deficient number, since it is larger than the sum of its proper divisors (40343147).

201715705 is an equidigital number, since it uses as much as digits as its factorization.

201715705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40343146.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 201715705 is about 14202.6654188571. The cubic root of 201715705 is about 586.4710391057.

The spelling of 201715705 in words is "two hundred one million, seven hundred fifteen thousand, seven hundred five".