201701566 has 16 divisors (see below), whose sum is σ = 349472880. Its totient is φ = 86289280.

The previous prime is 201701543. The next prime is 201701569. The reversal of 201701566 is 665107102.

201701566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×201701566³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201701569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269281 + ... + 270028.

It is an arithmetic number, because the mean of its divisors is an integer number (21842055).

Almost surely, 2^201701566 is an apocalyptic number.

201701566 is a deficient number, since it is larger than the sum of its proper divisors (147771314).

201701566 is a wasteful number, since it uses less digits than its factorization.

201701566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539339.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 201701566 is about 14202.1676514538. The cubic root of 201701566 is about 586.4573361440.

Adding to 201701566 its reverse (665107102), we get a palindrome (866808668).

It can be divided in two parts, 20170 and 1566, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 201701566 in words is "two hundred one million, seven hundred one thousand, five hundred sixty-six".