201561201 has 12 divisors (see below), whose sum is σ = 291452928. Its totient is φ = 134231544.

The previous prime is 201561193. The next prime is 201561203. The reversal of 201561201 is 102165102.

It is not a de Polignac number, because 201561201 - 2³ = 201561193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201561203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2545 + ... + 20238.

It is an arithmetic number, because the mean of its divisors is an integer number (24287744).

Almost surely, 2^201561201 is an apocalyptic number.

It is an amenable number.

201561201 is a deficient number, since it is larger than the sum of its proper divisors (89891727).

201561201 is a wasteful number, since it uses less digits than its factorization.

201561201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23772 (or 23769 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 201561201 is about 14197.2251161979. The cubic root of 201561201 is about 586.3212651685.

The spelling of 201561201 in words is "two hundred one million, five hundred sixty-one thousand, two hundred one".