201323166 has 32 divisors (see below), whose sum is σ = 442181376. Its totient is φ = 60600000.

The previous prime is 201323159. The next prime is 201323189. The reversal of 201323166 is 661323102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135 + ... + 20066.

It is an arithmetic number, because the mean of its divisors is an integer number (13818168).

Almost surely, 2^201323166 is an apocalyptic number.

201323166 is an abundant number, since it is smaller than the sum of its proper divisors (240858210).

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

201323166 is a wasteful number, since it uses less digits than its factorization.

201323166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20368.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 201323166 is about 14188.8394874281. The cubic root of 201323166 is about 586.0903676250.

Adding to 201323166 its reverse (661323102), we get a palindrome (862646268).

The spelling of 201323166 in words is "two hundred one million, three hundred twenty-three thousand, one hundred sixty-six".