Search a number
-
+
201021313 = 449344741
BaseRepresentation
bin10111111101101…
…01011110000001
3112000020221101211
423332311132001
5402430140223
631540330121
74660436653
oct1376653601
9460227354
10201021313
11a3520319
12573a3941
133285412c
141c9aa6d3
15129abd0d
hexbfb5781

201021313 has 4 divisors (see below), whose sum is σ = 201070548. Its totient is φ = 200972080.

The previous prime is 201021283. The next prime is 201021323. The reversal of 201021313 is 313120102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100560784 + 100460529 = 10028^2 + 10023^2 .

It is a cyclic number.

It is not a de Polignac number, because 201021313 - 221 = 198924161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201021293 and 201021302.

It is not an unprimeable number, because it can be changed into a prime (201021323) 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 3 ways as a sum of consecutive naturals, for example, 17878 + ... + 26863.

It is an arithmetic number, because the mean of its divisors is an integer number (50267637).

Almost surely, 2201021313 is an apocalyptic number.

It is an amenable number.

201021313 is a deficient number, since it is larger than the sum of its proper divisors (49235).

201021313 is an equidigital number, since it uses as much as digits as its factorization.

201021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49234.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 201021313 is about 14178.1985103891. The cubic root of 201021313 is about 585.7973037733.

Adding to 201021313 its reverse (313120102), we get a palindrome (514141415).

The spelling of 201021313 in words is "two hundred one million, twenty-one thousand, three hundred thirteen".

Divisors: 1 4493 44741 201021313