201431871 has 12 divisors (see below), whose sum is σ = 291209880. Its totient is φ = 134171280.

The previous prime is 201431869. The next prime is 201431873. The reversal of 201431871 is 178134102.

201431871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201431869) and next prime (201431873).

It is not a de Polignac number, because 201431871 - 2¹ = 201431869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201431873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1956 + ... + 20166.

It is an arithmetic number, because the mean of its divisors is an integer number (24267490).

Almost surely, 2^201431871 is an apocalyptic number.

201431871 is a deficient number, since it is larger than the sum of its proper divisors (89778009).

201431871 is a wasteful number, since it uses less digits than its factorization.

201431871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19446 (or 19443 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 201431871 is about 14192.6696220267. The cubic root of 201431871 is about 586.1958356828.

Adding to 201431871 its reverse (178134102), we get a palindrome (379565973).

The spelling of 201431871 in words is "two hundred one million, four hundred thirty-one thousand, eight hundred seventy-one".