201606210 has 48 divisors (see below), whose sum is σ = 564500664. Its totient is φ = 49625856.

The previous prime is 201606161. The next prime is 201606211. The reversal of 201606210 is 12606102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 64786401 + 136819809 = 8049^2 + 11697^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201606211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84987 + ... + 87326.

Almost surely, 2^201606210 is an apocalyptic number.

201606210 is an abundant number, since it is smaller than the sum of its proper divisors (362894454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201606210 is a wasteful number, since it uses less digits than its factorization.

201606210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172339 (or 172336 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 201606210 is about 14198.8101614185. The cubic root of 201606210 is about 586.3649041387.

The spelling of 201606210 in words is "two hundred one million, six hundred six thousand, two hundred ten".