201630 has 64 divisors (see below), whose sum is σ = 580608. Its totient is φ = 44160.

The previous prime is 201629. The next prime is 201653. The reversal of 201630 is 36102.

201630 = T₄₄ + T₄₅ + ... + T₁₀₈.

201630 is a Rhonda number in base 8.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4267 + ... + 4313.

It is an arithmetic number, because the mean of its divisors is an integer number (9072).

2²⁰¹⁶³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290304).

201630 is an abundant number, since it is smaller than the sum of its proper divisors (378978).

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

201630 is a wasteful number, since it uses less digits than its factorization.

201630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 201630 is about 449.0322928254. The cubic root of 201630 is about 58.6387967371.

Adding to 201630 its reverse (36102), we get a palindrome (237732).

The spelling of 201630 in words is "two hundred one thousand, six hundred thirty".