201061861 has 16 divisors (see below), whose sum is σ = 269958528. Its totient is φ = 144619200.

The previous prime is 201061853. The next prime is 201061921. The reversal of 201061861 is 168160102.

It is not a de Polignac number, because 201061861 - 2³ = 201061853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201061831) 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, 99430 + ... + 101431.

It is an arithmetic number, because the mean of its divisors is an integer number (16872408).

Almost surely, 2^201061861 is an apocalyptic number.

It is an amenable number.

201061861 is a deficient number, since it is larger than the sum of its proper divisors (68896667).

201061861 is a wasteful number, since it uses less digits than its factorization.

201061861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200892.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 201061861 is about 14179.6283801798. The cubic root of 201061861 is about 585.8366881746.

The spelling of 201061861 in words is "two hundred one million, sixty-one thousand, eight hundred sixty-one".