201831630 has 288 divisors, whose sum is σ = 672924672. Its totient is φ = 37889280.

The previous prime is 201831613. The next prime is 201831631. The reversal of 201831630 is 36138102.

201831630 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 201831630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201831631) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4294267 + ... + 4294313.

It is an arithmetic number, because the mean of its divisors is an integer number (2336544).

Almost surely, 2^201831630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201831630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336462336).

201831630 is an abundant number, since it is smaller than the sum of its proper divisors (471093042).

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

201831630 is a wasteful number, since it uses less digits than its factorization.

201831630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 201831630 is about 14206.7459328306. The cubic root of 201831630 is about 586.5833649085.

Adding to 201831630 its reverse (36138102), we get a palindrome (237969732).

The spelling of 201831630 in words is "two hundred one million, eight hundred thirty-one thousand, six hundred thirty".