201327721 has 9 divisors (see below), whose sum is σ = 234313149. Its totient is φ = 172481484.

The previous prime is 201327713. The next prime is 201327751. The reversal of 201327721 is 127723102.

The square root of 201327721 is 14189.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 201327721 - 2³ = 201327713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201327751) 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 8 ways as a sum of consecutive naturals, for example, 98310 + ... + 100336.

Almost surely, 2^201327721 is an apocalyptic number.

201327721 is the 14189-th square number.

201327721 is the 7095-th centered octagonal number.

It is an amenable number.

201327721 is a deficient number, since it is larger than the sum of its proper divisors (32985428).

201327721 is an frugal number, since it uses more digits than its factorization.

201327721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The cubic root of 201327721 is about 586.0947877514.

Multiplying 201327721 by its sum of digits (25), we get a square (5033193025 = 70945²).

The spelling of 201327721 in words is "two hundred one million, three hundred twenty-seven thousand, seven hundred twenty-one".