201312291 has 16 divisors (see below), whose sum is σ = 272256768. Its totient is φ = 132300000.

The previous prime is 201312289. The next prime is 201312299. The reversal of 201312291 is 192213102.

It is not a de Polignac number, because 201312291 - 2¹ = 201312289 is a prime.

It is a super-3 number, since 3×201312291³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (201312299) 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 15 ways as a sum of consecutive naturals, for example, 74730 + ... + 77376.

It is an arithmetic number, because the mean of its divisors is an integer number (17016048).

Almost surely, 2^201312291 is an apocalyptic number.

201312291 is a deficient number, since it is larger than the sum of its proper divisors (70944477).

201312291 is a wasteful number, since it uses less digits than its factorization.

201312291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 201312291 is about 14188.4562585223. The cubic root of 201312291 is about 586.0798143644.

Adding to 201312291 its reverse (192213102), we get a palindrome (393525393).

It can be divided in two parts, 20131 and 2291, that added together give a palindrome (22422).

The spelling of 201312291 in words is "two hundred one million, three hundred twelve thousand, two hundred ninety-one".