201452909 has 4 divisors (see below), whose sum is σ = 230231904. Its totient is φ = 172673916.

The previous prime is 201452843. The next prime is 201452939. The reversal of 201452909 is 909254102.

201452909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201452909 - 2²⁰ = 200404333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201452939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14389487 + ... + 14389500.

It is an arithmetic number, because the mean of its divisors is an integer number (57557976).

Almost surely, 2^201452909 is an apocalyptic number.

It is an amenable number.

201452909 is a deficient number, since it is larger than the sum of its proper divisors (28778995).

201452909 is an equidigital number, since it uses as much as digits as its factorization.

201452909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28778994.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 201452909 is about 14193.4107599266. The cubic root of 201452909 is about 586.2162428451.

The spelling of 201452909 in words is "two hundred one million, four hundred fifty-two thousand, nine hundred nine".