201271861 has 24 divisors (see below), whose sum is σ = 244188000. Its totient is φ = 165209184.

The previous prime is 201271853. The next prime is 201271867. The reversal of 201271861 is 168172102.

It is not a de Polignac number, because 201271861 - 2³ = 201271853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201271867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197010 + ... + 198028.

It is an arithmetic number, because the mean of its divisors is an integer number (10174500).

Almost surely, 2^201271861 is an apocalyptic number.

It is an amenable number.

201271861 is a deficient number, since it is larger than the sum of its proper divisors (42916139).

201271861 is a wasteful number, since it uses less digits than its factorization.

201271861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 201271861 is about 14187.0314371964. The cubic root of 201271861 is about 586.0405771620.

The spelling of 201271861 in words is "two hundred one million, two hundred seventy-one thousand, eight hundred sixty-one".