201730144 has 192 divisors, whose sum is σ = 541900800. Its totient is φ = 71539200.

The previous prime is 201730129. The next prime is 201730147. The reversal of 201730144 is 441037102.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201730147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1451227 + ... + 1451365.

It is an arithmetic number, because the mean of its divisors is an integer number (2822400).

Almost surely, 2^201730144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201730144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270950400).

201730144 is an abundant number, since it is smaller than the sum of its proper divisors (340170656).

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

201730144 is a wasteful number, since it uses less digits than its factorization.

201730144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 201730144 is about 14203.1737298394. The cubic root of 201730144 is about 586.4850321548.

Adding to 201730144 its reverse (441037102), we get a palindrome (642767246).

The spelling of 201730144 in words is "two hundred one million, seven hundred thirty thousand, one hundred forty-four".