201491712 has 216 divisors, whose sum is σ = 624973440. Its totient is φ = 64696320.

The previous prime is 201491687. The next prime is 201491729. The reversal of 201491712 is 217194102.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2550489 + ... + 2550567.

Almost surely, 2^201491712 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 201491712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312486720).

201491712 is an abundant number, since it is smaller than the sum of its proper divisors (423481728).

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

201491712 is an frugal number, since it uses more digits than its factorization.

201491712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 201491712 is about 14194.7776312276. Note that the first 3 decimals coincide. The cubic root of 201491712 is about 586.2538785862.

The spelling of 201491712 in words is "two hundred one million, four hundred ninety-one thousand, seven hundred twelve".