201543621343 has 2 divisors, whose sum is σ = 201543621344. Its totient is φ = 201543621342.

The previous prime is 201543621277. The next prime is 201543621457. The reversal of 201543621343 is 343126345102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201543621343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201543621299 and 201543621308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201543621143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100771810671 + 100771810672.

It is an arithmetic number, because the mean of its divisors is an integer number (100771810672).

Almost surely, 2^201543621343 is an apocalyptic number.

201543621343 is a deficient number, since it is larger than the sum of its proper divisors (1).

201543621343 is an equidigital number, since it uses as much as digits as its factorization.

201543621343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 201543621343 its reverse (343126345102), we get a palindrome (544669966445).

The spelling of 201543621343 in words is "two hundred one billion, five hundred forty-three million, six hundred twenty-one thousand, three hundred forty-three".