201035561 has 16 divisors (see below), whose sum is σ = 214905600. Its totient is φ = 187522128.

The previous prime is 201035543. The next prime is 201035579. The reversal of 201035561 is 165530102.

It is an interprime number because it is at equal distance from previous prime (201035543) and next prime (201035579).

It is a cyclic number.

It is not a de Polignac number, because 201035561 - 2²² = 196841257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201035501) 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, 430250 + ... + 430716.

It is an arithmetic number, because the mean of its divisors is an integer number (13431600).

Almost surely, 2^201035561 is an apocalyptic number.

It is an amenable number.

201035561 is a deficient number, since it is larger than the sum of its proper divisors (13870039).

201035561 is a wasteful number, since it uses less digits than its factorization.

201035561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 201035561 is about 14178.7009630643. The cubic root of 201035561 is about 585.8111435044.

Adding to 201035561 its reverse (165530102), we get a palindrome (366565663).

The spelling of 201035561 in words is "two hundred one million, thirty-five thousand, five hundred sixty-one".