201571164 has 36 divisors (see below), whose sum is σ = 509964000. Its totient is φ = 67132800.

The previous prime is 201571157. The next prime is 201571187. The reversal of 201571164 is 461175102.

It is a happy number.

201571164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70564 + ... + 73364.

Almost surely, 2^201571164 is an apocalyptic number.

It is an amenable number.

201571164 is an abundant number, since it is smaller than the sum of its proper divisors (308392836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201571164 is a wasteful number, since it uses less digits than its factorization.

201571164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4810 (or 4805 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 201571164 is about 14197.5759902879. The cubic root of 201571164 is about 586.3309254643.

It can be divided in two parts, 20157 and 1164, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 201571164 in words is "two hundred one million, five hundred seventy-one thousand, one hundred sixty-four".