201509643143 has 2 divisors, whose sum is σ = 201509643144. Its totient is φ = 201509643142.

The previous prime is 201509643103. The next prime is 201509643217. The reversal of 201509643143 is 341346905102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201509643143 - 2¹⁸ = 201509380999 is a prime.

It is a super-2 number, since 2×201509643143² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201509643097 and 201509643106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201509643103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100754821571 + 100754821572.

It is an arithmetic number, because the mean of its divisors is an integer number (100754821572).

Almost surely, 2^201509643143 is an apocalyptic number.

201509643143 is a deficient number, since it is larger than the sum of its proper divisors (1).

201509643143 is an equidigital number, since it uses as much as digits as its factorization.

201509643143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 201509643143 in words is "two hundred one billion, five hundred nine million, six hundred forty-three thousand, one hundred forty-three".