201271851 has 16 divisors (see below), whose sum is σ = 325288320. Its totient is φ = 121982760.

The previous prime is 201271849. The next prime is 201271853. The reversal of 201271851 is 158172102.

It is an interprime number because it is at equal distance from previous prime (201271849) and next prime (201271853).

It is not a de Polignac number, because 201271851 - 2¹ = 201271849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (201271853) 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, 338545 + ... + 339138.

It is an arithmetic number, because the mean of its divisors is an integer number (20330520).

Almost surely, 2^201271851 is an apocalyptic number.

201271851 is a deficient number, since it is larger than the sum of its proper divisors (124016469).

201271851 is a wasteful number, since it uses less digits than its factorization.

201271851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677703 (or 677697 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 201271851 is about 14187.0310847619. The cubic root of 201271851 is about 586.0405674564.

The spelling of 201271851 in words is "two hundred one million, two hundred seventy-one thousand, eight hundred fifty-one".