201021343 has 4 divisors (see below), whose sum is σ = 201923008. Its totient is φ = 200119680.

The previous prime is 201021323. The next prime is 201021367. The reversal of 201021343 is 343120102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201021343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450498 + ... + 450943.

It is an arithmetic number, because the mean of its divisors is an integer number (50480752).

Almost surely, 2^201021343 is an apocalyptic number.

201021343 is a deficient number, since it is larger than the sum of its proper divisors (901665).

201021343 is an equidigital number, since it uses as much as digits as its factorization.

201021343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901664.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 201021343 is about 14178.1995683514. The cubic root of 201021343 is about 585.7973329143.

Adding to 201021343 its reverse (343120102), we get a palindrome (544141445).

The spelling of 201021343 in words is "two hundred one million, twenty-one thousand, three hundred forty-three".