201331345 has 8 divisors (see below), whose sum is σ = 242995176. Its totient is φ = 160133376.

The previous prime is 201331343. The next prime is 201331399. The reversal of 201331345 is 543133102.

It can be written as a sum of positive squares in 4 ways, for example, as 38539264 + 162792081 = 6208^2 + 12759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201331345 - 2¹ = 201331343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201331343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115512 + ... + 117241.

It is an arithmetic number, because the mean of its divisors is an integer number (30374397).

Almost surely, 2^201331345 is an apocalyptic number.

It is an amenable number.

201331345 is a deficient number, since it is larger than the sum of its proper divisors (41663831).

201331345 is a wasteful number, since it uses less digits than its factorization.

201331345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232931.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 201331345 is about 14189.1277039852. The cubic root of 201331345 is about 586.0983043970.

Adding to 201331345 its reverse (543133102), we get a palindrome (744464447).

The spelling of 201331345 in words is "two hundred one million, three hundred thirty-one thousand, three hundred forty-five".