201331143 has 32 divisors (see below), whose sum is σ = 331591680. Its totient is φ = 119892960.

The previous prime is 201331139. The next prime is 201331177. The reversal of 201331143 is 341133102.

It is not a de Polignac number, because 201331143 - 2² = 201331139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201331103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1630 + ... + 20132.

It is an arithmetic number, because the mean of its divisors is an integer number (10362240).

Almost surely, 2^201331143 is an apocalyptic number.

201331143 is a deficient number, since it is larger than the sum of its proper divisors (130260537).

201331143 is a wasteful number, since it uses less digits than its factorization.

201331143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18556 (or 18550 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 201331143 is about 14189.1205858573. The cubic root of 201331143 is about 586.0981083820.

Adding to 201331143 its reverse (341133102), we get a palindrome (542464245).

The spelling of 201331143 in words is "two hundred one million, three hundred thirty-one thousand, one hundred forty-three".