201288621 has 16 divisors (see below), whose sum is σ = 279531648. Its totient is φ = 128721600.

The previous prime is 201288613. The next prime is 201288643. The reversal of 201288621 is 126882102.

It is not a de Polignac number, because 201288621 - 2³ = 201288613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201288671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4890 + ... + 20651.

It is an arithmetic number, because the mean of its divisors is an integer number (17470728).

Almost surely, 2^201288621 is an apocalyptic number.

It is an amenable number.

201288621 is a deficient number, since it is larger than the sum of its proper divisors (78243027).

201288621 is a wasteful number, since it uses less digits than its factorization.

201288621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25652.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 201288621 is about 14187.6221052014. The cubic root of 201288621 is about 586.0568433329.

The spelling of 201288621 in words is "two hundred one million, two hundred eighty-eight thousand, six hundred twenty-one".