201209164 has 24 divisors (see below), whose sum is σ = 399161840. Its totient is φ = 87977664.

The previous prime is 201209143. The next prime is 201209167. The reversal of 201209164 is 461902102.

It is not an unprimeable number, because it can be changed into a prime (201209167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100839 + ... + 102814.

Almost surely, 2^201209164 is an apocalyptic number.

It is an amenable number.

201209164 is a deficient number, since it is larger than the sum of its proper divisors (197952676).

201209164 is a wasteful number, since it uses less digits than its factorization.

201209164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203689 (or 203687 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 201209164 is about 14184.8216062099. The cubic root of 201209164 is about 585.9797195045.

The spelling of 201209164 in words is "two hundred one million, two hundred nine thousand, one hundred sixty-four".